Answer:
there are other ways to compensate for binges that don't involve purging
Answer:
Not all bulimics binge before purging.
The rainforest contains half of the Earth’s wildlife and at least two thirds of its plant species. It can hold great quantities of water and is very important to the planet’s water cycle. Rainforests remove vast amounts of CO2 from the atmosphere and replace it with oxygen. Which of the following statements best summarize the above information about rainforests?a.The majority of the planet’s oxygen is generated from the rainforest.b.Two-thirds of all plants originated from the rainforest.c.The rainforest is a major catalyst for the planet’s water cycle.d.The rainforest is important to life as a whole on the planet. Please select the best answer from the choices provided
D.The rain forest is important to life as a whole on the planet.
Answer: d. The Rainforest is important to life as a whole to the planet
Explanation: option D best summarizes the information because the whole processes described are all essential in sustaining life as it is more encompassing that the other options. Plants therein sequestering carbondioxide and releasing oxygen is the process of photosynthesis, sugars are also produced which give life as food to a variety of animals. Plants and animals also avail themselves of the great quantities of water held by the plants. Thus the whole cycle produces more plants and animals to replace dying ones thereby preserving life.
Dietary fats that are solid at room temperature are
animal fats are solid at room temperature but plant fats are liquid.
why do some beaches have bigger waves than others??
This is for a biology assignment called Hawaiian Rabbit Hole
and it said us to choose a topic that made us go you hmmmm or new things you learned and i choosed Why do some beaches have bigger waves than others
Answer: wherever the wind blows :)
Explantation: the waves go 90 degrees to the left (southern hemisphere) or the right (northern hemisphere)
also, if it's blowing away from the beach, it causes upwelling,
which brings nutrients from the bottom of the ocean and attracts more organisms.
hope this helps :)
Well, this depends on the strength of the wind. The stronger the wind, the longer it blows and the longer the fetch, or stretch of ocean over which it blows, the larger the waves.
Emitting light through a series of chemical reactions by certain living organisms is called ________
Answer:
Bioluminescence
Explanation:
Bioluminescence is a phenomenon of light emitting by a living organism caused by set of chemical reaction within that organism. The reaction in which light is a final product involves light-emitting molecule such as luciferin and enzyme such as luciferase that reacts with it (causes the oxidation of the luciferin). Luciferin can be produced by organisms themselves or can be absorbed from the food.
Usually marine organisms have the ability to produce light, but this reaction might occur in some bacteria and fungi.
An allele that masks another allele is known as
Answer:
dominant allele
Explanation:
it's on google
The lacZ and lacY genes are transcribed when:glucose levels are high and lactose levels are low.lactose is absent and glucose levels are high.glucose levels are low, regardless of the level of lactose in the cell.lactose is present, regardless of the level of glucose in the cell.lactose is present and glucose levels are low.
Answer:
lactose is present and glucose levels are low
Explanation:
Lactose operon or lac operon (includes lacZ and lacY genes) is found in some bacteria and the products of its genes are involved in lactose metabolism. So, this operon is active (genes are transcribed) when lactose is present and glucose is absent. The operon is regulated by the lac repressor which acts as a lactose sensor and catabolite activator protein (CAP) which acts as a glucose sensor.
When there is lactose (in the form of allolactose) lac repressor detects it and stops being repressor. This enables transcription.
CAP detects glucose (via cAMP) and activates transcription when glucose levels are low/
The lacZ and lacY genes are transcribed when lactose is present and glucose levels are low. This occurs because allolactose, an inducer, prevents the repressor protein from binding to the operator, allowing transcription to occur. Additionally, low levels of glucose activate the transcription through the cAMP-catabolite activator protein (CAP) complex.
Explanation:The lacZ and lacY genes are transcribed when lactose is present and glucose levels are low. The lac operon is a classic example of an inducible operon, meaning that it is only transcribed under specific conditions. When lactose is present, it is converted to allolactose, which acts as an inducer and prevents the repressor protein from binding to the operator. Additionally, when glucose levels are low, cAMP binds to the catabolite activator protein (CAP), which then activates the transcription of the lac operon.
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WILL GIVE BRAINLIEST!!
What statement(s) below best describe coordinate control of genes in eukaryotic cells?
Genes involved in a related metabolic process are scattered over different chromosomes, but their coactivation is achieved because they share a specific combination of control elements that bind to the same activator molecules.
Different genes that code for proteins involved in the same metabolic process share the same enhancer regions.
The coordinated expression of different genes involved in the same metabolic process is enhanced by the bending of DNA to bring the bound activators closer to the promoter to form a transcription factory.
I and II
I and III
II only
III only
The correct answer is options I and III, which demonstrate the complexity of coordinate control of genes in eukaryotic cells where gene activation can be achieved despite genes being located on different chromosomes.
Explanation:The statements that best describe coordinate control of genes in eukaryotic cells are: Genes involved in a related metabolic process are scattered over different chromosomes, but their coactivation is achieved because they share a specific combination of control elements that bind to the same activator molecules, and the coordinated expression of different genes involved in the same metabolic process is enhanced by the bending of DNA to bring the bound activators closer to the promoter to form a transcription factory. Therefore, the correct answer is options I and III. This reflects the complex nature of eukaryotic gene expression, which is regulated not just at the transcriptional level but also epigenetically and post-transcriptionally.
Unlike prokaryotes, eukaryotic cells have a more complex system for gene regulation, involving multiple control elements, activators, and repressors that modify chromatin structure and DNA methylation. These epigenetic modifications control the accessibility of transcription factors to DNA, aiding in the precise and coordinated regulation of genes necessary for diverse cellular functions.
A surgical puncture to aspirate fluid from the douglas cul-de-sac (the rectouterine pouch) is called
Answer:
surgical puncture into the pelvic cavity to remove fluid from the space between the rectum and uterus, called the rectouterine pouch (Douglas's cul-de-sac).
Culdocentesis is the medical procedure that involves making a puncture to aspirate fluid from the douglas cul-de-sac (or rectouterine pouch).
Explanation:The procedure involved in making a puncture to aspirate fluid from the douglas cul-de-sac, also known as the rectouterine pouch, is referred to as culdocentesis. This medical technique involves inserting a needle into the area posterior to the vagina and anterior to the rectum to aspirate any fluid that might have accumulated due to different conditions such as ectopic pregnancy, pelvic inflammatory disease, or a ruptured ovarian cyst.
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A biology student is studying the effects of acid rain on tomato plants. He plants four tomato plants in identical pots, using the same type of soil to fill each pot. He places the pots together in the same location. They receive the same amount of sunlight and water each day. The only difference is the pH of the water used to water the plants. The first plant receives water with a neutral pH of 7, which will allow the student to better determine the effects of giving plants water that is more acidic. The second plant receives water with a pH of 5. The third receives water with a pH of 3. The fourth receives water with a pH of 1. What is the serious flaw in the design of this experiment?
Answer:
he used multiple different types of water the experiment is to broad
Explanation:
he can't compare 4 different ph's in 1 experiment
A qualified genetics counselor is working with a child who has been diagnosed with fragile x syndrome. after extensive research about the condition, she meets with the parents to discuss the features of the disease and the child's prognosis. the session lasted 45 minutes. what cpt® and icd-10-cm codes are reported?
Answer:
CPT® Index - 96040
icd-10-cm code - Q99.2
Explanation:
Here in this case the diagnosis came out with fragility in X chromosome. This is some thing related with medical genetics. Hence, the CPT® Index for this scenario would be 96040. As per the American Medical Association, CPT® Index 96040 cover cases that fall into the category of “Medical Genetics and Genetic Counseling Services” which also involves counseling either with the patient or family for 30 minutes. The icd-10-cm code – Q99.2 deals with the problems associated with genetic abnormality
Hence, the answer is
CPT® Index - 96040
icd-10-cm code - Q99.2
A genetic counselor would report a combination of CPT and ICD-10-CM codes for a session on Fragile X syndrome, which would include medical genetics counseling services and the specific ICD-10-CM code for Fragile X syndrome, F81.82.
Explanation:When it comes to the 45-minute session with a genetic counselor regarding a child diagnosed with Fragile X syndrome, a combination of CPT (Current Procedural Terminology) and ICD-10-CM (International Classification of Diseases, Tenth Revision, Clinical Modification) codes would be reported. The CPT code used would be reflective of the genetic counseling services provided. This would typically fall under a code for medical genetics and genetic counseling services. The specific ICD-10-CM code for Fragile X syndrome is FMR1 related disorders, including the specific code for Fragile X syndrome, which is F81.82.
It is essential for genetic counselors to provide education on the implications of genetic testing and the advantages and drawbacks of various testing methods, such as amniocentesis or chorionic villus sampling. In this case, the genetic counselor helps the parents understand the inheritance of Fragile X syndrome, the prognosis for the child, and the risks for future offspring.
During nitrification, _____.
A plants create nitrogen compounds
B nitrogen is added to the atmosphere
C bacteria break down amonia into nitrogen
D ammonia is changed back into nitrate
Answer:
C. Bacteria breaks down ammonia into nitrogen
Explanation:
Option (D) is the correct answer. During nitrification, bacteria convert ammonia to nitrites, and then to nitrates. This process ensures that nitrogen is available to plants in a usable form. Thus, ammonia is changed back into nitrate.
During nitrification, specific bacteria convert ammonia (NH₃) into nitrites (NO₂), and then other bacteria convert nitrites into nitrates (NO₃). This process is essential in the nitrogen cycle, which ensures that nitrogen is available to plants in a usable form.
Therefore, the correct answer is:
D. ammonia is changed back into nitrate.To summarize, in the nitrification process, bacteria change ammonia to nitrite and then to nitrate, making it available for plant uptake.
? what does flacc stand for? how old does a child need to be to use the flacc scale for pain? what is the form of evaluation when using the flacc scale?
Answer:
FLACC stands for the Face, Legs, Activity, Cry, and Consalibility scale. Children should be between 2 months to 7 years of age. The form of evaluation is a scale from 1-10 to describe pain.
Explanation:
FLACC stands for Face, Legs, Activity, Cry, and Consolability, and it's a tool used to assess pain in children aged 2 months to 7 years. The scale measures pain through five categories, with caregivers or healthcare professionals observing the child's behavior to gauge pain levels.
Explanation:FLACC stands for Face, Legs, Activity, Cry, and Consolability. It is a tool used to assess pain in children, particularly those who can't express their pain verbally. These five categories help evaluate the physical and behavioral signs of pain. Each category is scored from 0 to 2, providing a total score that can range from 0 (no pain) to 10 (severe pain).
The FLACC scale is typically used for children aged 2 months to 7 years, but it can be also used with older children who are unable to communicate verbally due to cognitive or developmental disabilities. However, for children above 7 years with good communication skills, other pain assessment scales should be used.
When using the FLACC scale, caregivers or healthcare professionals watch and evaluate the child's behavior and expressions to gauge their level of pain. They score each of the five categories based on their observations and sum up these scores to quantify the child's pain level.
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Benjy is a preschooler. He can put a dish into the microwave and press the "2" button to cook for 2 minutes. One day he sees his mother wipe the front of the microwave with a damp paper towel before she presses a number button. After that, Benjy rubs the front of the microwave with a napkin before he presses the number button. Why?
It is because little kids and toddlers copy everything that they see other people do. If they see you doing something, then they think they are supposed to do it too, and they copy you. Also they are “like sponges”(that’s what my mom says) and “soak up(/remember) everything”.
Which describes the legs of all anthropods. a. They carry poison b. They have claws c. They are jointed d. They store food
Answer: C. They are jointed
Explanation: “arthro” is a root meaning “jointed”
Answer:
C. They're jointed
Explanation:
Anthro= Jointed
How evolution has been both beneficial and detrimental to the human species
Evolution is a term derived from word "evolve" which means "to unroll" or a process of development where organism reached a final destination. In scientific terminology, evolution also means almost similar, the process in which living organisms adapt themselves with respect to the environmental fluctuations by bringing some changes in their genetic makeup.
Though this is an inevitable process which is not in control of a certain living organism, therefore it has both positive and negative effects on species.
Beneficial aspects:
Evolution is the process which helps the organisms to survive when there are detrimental environmental hazards. In this process some organisms of a specie die while the others go through some genetic modification in such a way that they are better able to bear those environmental constraints and survive. This fittest and survived specie then reproduce superior offspring that are better able to withstand that environmental fluctuation in future. In simple terms we can say that evolution is a key process which makes specie more fit.
Harmful aspects:
Since evolution is just a hit and trial mechanism in which DNA undergoes some modifications in organism so the results are not always certain goal oriented. One devastating effect of evolution is parasitism which causes deadly effects for humans. There are some viruses and bacteria which are disease causing and when we are able to kill them with antibiotics they undergo evolution and form stronger parasites which are more difficult to combat the next time. This process has created a resistance for multiple strains of bacteria and the medical world is worried with the troublesome effects of this evolution in diseases like tuberculosis and AIDS.
Therefore, evolution is both beneficial and harmful for species.
Hope it helps!
Twisted protein fibers that are found within the cells of the hippocampus and certain brain areas are called _____, and an excess of them may be related to the development of alzheimer's disease.
Answer:
Prions
Explanation:
Prions are misfolded proteins found in the brain, they cause other proteins to fold the same way. The cell can't degrade the proteins which leads to an accumulation of these misfolded proteins and the development of neurodegenerative diseases like Alzheimer and Parkinson
Wh ch of the following statements best describes the effect of climate on biome distribution? a.Average annual temperature and precipitation are sufficient to predict which biome will be found in an area b.Seasonal fluctuation of temperature is not a limiting factor in biome distribution if areas have the same annual temperature and precipitation means c.The average climate and pattern of climate are important in determining biome distribution d.Temperate forests and grasslands are different biomes because they receive a different quality and quantity of sunlight, even though they have essentially the same annual temperature and precipitation
Answer:
The correct option is C.
Explanation:
Climate refers to the average weather condition of a particular place over a period of about 35 years. Elements of climate include factors such as temperature, precipitation, relative humidity, cloudiness, atmospheric pressure, wind, sunshine, etc. There are different types of biomes all over the world.
Climate is a principal determinant of the type of biome that can be found in a particular place. This is because the type of climate obtainable in a place determine the types of vegetation and the corresponding animals that will be found in that particular place. Thus, the average climate pattern of climate are important in determining biome distribution.
Climate, characterized by temperature and rainfall, determines biome distribution. In terrestrial biomes, the variability in temperature and precipitation shapes the type of vegetation and animal life present in a particular biome. Similarly, in aquatic biomes, factors such as sunlight penetration, density, and temperature shape the structure and types of species in each biome.
Explanation:The best description of the effect of climate on biome distribution is that the average climate and patterns of climate are key in determining biome distribution. This is because the climate, characterized by predictable long-term atmospheric conditions, including temperature and rainfall, influences the type of vegetation and animal life that can thrive in a given area. These factors can vary based on the location's latitude, elevation, and other conditions. Biomes consist of multiple ecosystems with similar climates, which can be found in geographically distinct areas.
For instance, terrestrial biomes, including tropical wet forests, savannas, and deserts, each have characteristic climates. The tropical wet forest biome, characterized by warm temperatures, abundant water, and a year-round growing season, experiences high primary productivity, supporting a great variety of life. On the other hand, deserts and tundras, with their extreme temperatures and lack of water, have low primary productivity.
In aquatic biomes, other abiotic factors like sunlight penetration, water density, and temperature also shape the structure of these biomes. For example, different zones in the ocean will have different kinds of organisms adapted to conditions specific to each zone.
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What conditions are needed to form organic molecules from inorganic molecules?
Abundance of oxygen and the ozone layer
Active volcanoes and very cold temperatures
Presence of inorganic molecules with lightning and intense radiation
Low levels of ultraviolet radiation and a specific mixture of gases
Answer:
Presence of inorganic molecules with lightning and intense radiation
Explanation:
This process of formation of organic molecules from inorganic molecules is called abiogenesis. It is believed that this is how the first organic molecules were created in early earth about 3.8 billion years ago. The classic 1952 Miller–Urey experiment attempted to replicate the condition of early earth. They replicated lightning strikes (using electric parks) in a glass with greenhouse gases believed to have been the major constituents of early earth's atmosphere like methane. They were able to form primitive organic molecules from this experiment.
Answer: Presence if inorganic molecules with lighting and intense radiation
Explanation:
Denaturation of dna is a necessary step in southern blotting procedure because it separates double stranded dna into single stranded dna. T/F
The statement, Denaturation of dna is a necessary step in southern blotting procedure because it separates double stranded dna into single stranded dna, is true.
What molecule carries chemical energy that cells use for their functions
Answer:
ATP Adenosine triphosphate
Explanation:
Answer:
ATP
Explanation:
To signal hunger, the physiological need for food, the digestive tract sends messages to the ________ by way of hormones and nerves.
To signal hunger, the physiological need for food, the digestive tract sends messages to the hypothalamus by way of hormones and nerves.
The digestive tract sends messages to the hypothalamus by way of hormones and nerves to signal hunger.
To signal hunger, the physiological need for food, the digestive tract sends messages to the hypothalamus by way of hormones and nerves. The hypothalamus is a small region in the brain that regulates various bodily functions, including hunger and satiety.
When the body needs food, the digestive tract releases hormones such as ghrelin, which stimulates appetite. The hormones travel through the bloodstream and reach the hypothalamus, where they bind to specific receptors and trigger hunger signals.
In addition to hormones, the digestive tract also sends nerve signals to the hypothalamus. These nerve signals carry information about the state of the digestive system, such as the level of food in the stomach. If the stomach is empty, the nerves send signals to the hypothalamus, contributing to the sensation of hunger.
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Punnett squares are used to show possible combinations of alleles or to predict the probability of a trait occurring in offspring. Cats that have coats that are a patchwork of black and orange are called tortoiseshell cats, are typically female, and have genes that code for both black fur (Xo) and orange fur (XO) located on the X chromosomes. Y chromosomes do not code for color in tortoiseshell cats. A female cat that has only orange fur (XOXO) is crossed with a male cat that has only black fur (XoY). How many of the offspring will exhibit tortoiseshell coloring? 1 in 4. 2 in 4. 3 in 4. 4 in 4.
Answer:
2 in 4
Explanation:
If a female cat with orange fur (XOXO) is crossed with a male cat with black fur (XoY) then:
P: XOXO x XoY
F1: XOXo XOY XOXo XOY
This means that half of the offspring will be females with tortoiseshell color (XOXo) and other half of the offspring will be males with orange fur (XOY).
What two raw materials are needed by plants in order to perform photosynthesis?
Answer:
Water and CO2
Explanation:
Photosynthesis is a process performed by the plants (also some algae and bacteria) in which the energy of sunlight is transformed into chemical energy usable by those plants. Necessary components of this set of reactions are sunlight, water and CO2, while resulting products are glucose and oxygen. Products of photosynthesis are then used in the metabolic processes known as cellular respiration. During the cellular respiration, glucose and oxygen are used for the production of ATP, CO2 and water. Cellular respiration is performed in all living organisms.
Photosynthesis occur in the chloroplast, membrane organelles with photosynthetic pigments (such as chlorophyll).
Final answer:
Plants need carbon dioxide and water to perform photosynthesis, a process that occurs in the presence of sunlight, producing sugars and oxygen.
Explanation:
The two raw materials needed by plants to naturally perform photosynthesis are carbon dioxide and water. During photosynthesis, these materials are used in the presence of sunlight to produce sugars/carbohydrates like glucose and oxygen which are the main products of the process.
The reactions occur within the chloroplasts of the plant cells, where chlorophyll absorbs the sunlight needed to drive the process. During the cellular respiration, glucose and oxygen are used for the production of ATP, CO2 and water. Cellular respiration is performed in all living organisms.
In apples, the allele a is dominant for a big size apple and the allele r is dominant for red color. you cross one tree that produces big yellow apples and another tree that produces small red apples. half of the offspring trees produce big red apples and half produce big yellow apples. what are the genotypes of the parents?
Answer:
AArr and aaRR
Explanation:
The genotypes of the parents are AArr and aaRR.
What is the dihybrid cross?
A breeding experiment conducted between two organisms who are identical hybrids for two traits is called a dihybrid cross. Simply saying,, a dihybrid cross is a cross between two organisms, where both are heterozygous for two different traits. The individuals present in this type of trait are homozygous for a particular trait. These traits are due to the DNA segments which are called genes.
The parents carry different pairs of alleles for each trait in a dihybrid cross. One of the parents carries a dominant allele that is homozygous and the other one carries a recessive allele that is homozygous. The cross produces offspring in the F1 generation which is all heterozygous for specific traits.
Therefore, The genotypes of the parents are AArr and aaRR because a is dominant for a big size apple and the allele r is dominant for red color. One tree that produces big yellow apples and another tree that produces small red apples are crossed. Half of the offspring trees produce big red apples and half produce big yellow apples.
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What is the relationship between an amino acid and a protein?
Answer:
Amino Acids make up proteins
Explanation:
Amino acids are the monomers of proteins.
The loss of genetic diversity in crop plants can become disastrous. The Irish Potato Famine is an example of this problem. Which of the following is NOT a correct statement about the Irish Potato Famine? Most of the potatoes in Ireland were propagated from cuttings of the same plant. In the mid-1800s, much of the population of Ireland depended on potatoes. The potato originated in Ireland. When the crops were infected by a rot-causing mold, all of the potato plants were susceptible and most were wiped out. Most of the potatoes in Ireland were genetically the same.
Answer:
The correct option is this: THE POTATO ORIGINATED IN IRELAND.
Explanation:
In 1800, the country of Ireland experienced potato famine, during this period a lot of people died from starvation. The principal reason why this event occur is because most of the potatoes in the country at that time were genetically similar. These potatoes were propagated from cuttings of the same plants, thus, their biodiversity level were quite low. This hamper their ability to resist the fungal disease that destroyed all the potatoes in the country at that time. The variety of potato planted in Ireland at the time of famine was lumper potato, this potato specie originated from another country.
Final answer:
The incorrect statement about the Irish Potato Famine is that 'The potato originated in Ireland.'
Explanation:
The statement that "The potato originated in Ireland" is NOT correct about the Irish Potato Famine. The Irish Potato Famine, which occurred from 1845-1852 AD, demonstrated the consequences of low crop diversity when a single variety of potato, which did not originate in Ireland but in South America, became highly susceptible to a potato blight.
This susceptibility led to the crop being wiped out, causing mass famine, death, and mass emigration. Most of the potatoes in Ireland were indeed genetically the same, as they were propagated from cuttings of the same plant. This genetic uniformity, along with a heavy dependency of Ireland's population on potatoes as a staple food, compounded the disaster when the crops were infected by a rot-causing mold.
What is the primary energy source tht drives all weather events, including precipitation,hurrcanes and tornados
Answer:
The answer is the sun!
Serous fluid in the pericardial cavity __________. serous fluid in the pericardial cavity __________. is a remnant of embryonic development increases friction between the beating heart and the outer wall of the pericardial sac is a slippery fluid secreted by the fibrous pericardium is secreted by the heart itself is secreted by the epithelial cells of both layers of the serous pericardium
Answer:
The correct answer will be option-is secreted by the epithelial cells of both layers of the serous pericardium
Explanation:
Serous fluid is a fluid which resembles the serum of the blood in its color which is pale yellow to transparent.
The serous fluid is present in the cavities of the body organs like in heart, the fluid is present in the pericardial cavity.
The serous fluid lubricates the wall of the heart and is produced by the serous pericardial membranes. The secreted fluid gets collected between the pericardial cavity which helps slide the smooth movement of the serous layer against each other.
Thus, secreted by the epithelial cells of both layers of the serous pericardium is the correct answer.
The serous fluid in the pericardial cavity reduces friction during heart contractions by lubricating the space between the heart and the pericardial sac. It is secreted by a special epithelium called the mesothelium attached to the pericardium.
Explanation:The serous fluid in the pericardial cavity is secreted by the epithelial cells of both layers of the serous pericardium. Specifically, this substance is produced by a simple squamous epithelium known as a mesothelium, which is supported by connective tissue and attached to the pericardium. This fluid has a lubricating function, significantly reducing friction between the heart and the outer wall of the pericardial sac each time the heart contracts.
There are three serous cavities in the body: the pericardial, pleural, and peritoneal cavities. Serous membranes, including the pericardium surrounding the heart, form fluid-filled sacs or cavities and serve to cushion internal organs and prevent friction during movement.
For example, the serous fluid in the pericardial cavity safeguards the heart, while similar fluid in the pleural cavity protects the lungs. All these serous membranes secrete a thin, slippery serous fluid that functions to decrease friction and potentially harmful abrasion among organs.
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When elliot engages in intense exercise, particularly in cold weather or during allergy season, his bronchial tubes fill with mucus and contract. this causes him to cough and have serious breathing difficulties. elliot has
a. nocturnal enuresis.
b. emphysema.
c. bronchitis.
d. asthma?
A small population of a specific bird species lives on an island in the Pacific Ocean. All of the birds of this species have a crest of feathers on their heads. The color of the crest can be orange, yellow, or white. An individual's crest color does not effect its chance of survival or its reproductive success. A hurricane hits the island and all of the birds with orange crests are killed, as well as many of the individuals with yellow and white crests. This causes the gene for orange crests to be lost from the population. The loss of the gene coding for an orange crest in the bird population described above is an example of _______.
Answer:
Genetic drift
Explanation:
Genetic drift is an evolutionary mechanism that changes the allele frequency by random sampling (by chance). This type of mechanism has the major impact when population is hit by a natural disaster. As a consequence, the population becomes reduced in size and some alleles might be lost (such as that for for orange crests). The genetic variability is decreased.
Answer:
Genetic Drift
Explanation:
Genetic drift is a change in the allelic frequency within a population due to random chance. It is especially apparent within small breeding populations. For example, genetic drift can result in an allele being completely lost from a population by random chance, regardless of whether the allele has any effect on an individual's chance of survival or its reproductive success. (got it right on study island)