plasmids are small, extra chromosomal circular DNA that is distinct from cells chromosomal DNA. It is usually found in Bacteria.So, the answer is Small rings of bacterial DNA.
What time period lasted for more than half of the hypothesized history of the Earth? a. Carboniferous c. Paleozoic b. Cretaceous d. Precambrian Please select the best answer from the choices provided
What time period lasted for more than half of the hypothesized history of the Earth?
d. Precambrian
Your awnser in D] Precambrian. Hopefully i could help :)
What is the likely advantage of growing a genetically modified variety of corn that possesses its own pesticide?
The corn will be able to repel disease and insects that would otherwise be able to damage or kill the corn plant. The corn will not require any pesticide to do this, so it saves the grower of that corn money that would have been spent on pesticide.
Answer:
B) It is more efficient and economical to grow this variety.
Explanation:
Consider the status of the black-footed ferret. What is the MOST logical contributing factor to its endangered status? A) The exponential growth of ferret predator populations. B) Human encroachment that has greatly reduced the prairie dog populations. C) The growing habitat range of the prairie dog populations throughout the United States. Eliminate D) Climatic change that has significantly modified the climate of the central United States.
The most logical contributing factor for the endangered status of black-footed ferret is Human encroachment. Farmers and ranchers (with government assistance) eliminated many prairie dogs because their underground complexes were destructive to fields. This led to decrease in the prairie dog populations, the primary prey of black-footed ferret.
Answer:
b) human encroachment that has greatly reduced the prairie dog populations
Explanation:
i just did it on usatestprep and got it right
3) In cells, the production of proteins is handled by the ribosomes and endoplasmic reticulum, while the processing and packaging of proteins is handled by the _________ body.
New milestones in environmental policy will most likely deal with long-term issues. Please select the best answer from the choices provided T F
im pretty sure it is true
Answer:
it is TRUE!!!!!
Explanation:
A patient has just received an organ transplant. Which treatment would be the most effective in preventing the patients body from rejecting the organ?
To prevent the rejection of transplanted organ or graft the patient is advised to take immuno-suppressant drugs. These immuno-suppressants are necessary to prevent any immune reaction against the graft. Immune cells such as T-cell and B-cells may recognize the graft as foreign and act against the markers on the surface of transplanted organ leading to rejection. To minimize such response of immune system against the graft immuno-suppressants are given. Ex: Corticosteroid - prednisolone.
Answer:
The LAS determines who would benefit most from a transplant.
The LAS is based on age, oxygen requirement, pulmonary function and the distance walked in 6 minutes.
Explanation:
on edge
No black peppered moths have been found before 1845. Where did this black moth came from? Why was black moth not found before
in 1845 was around the time the industrial revolution began, so when this happened the black smoke coming from the factories turned most of the trees a darker color. which in turn caused a population shift since the dark peppered months were now the ones less frequently preyed on.
No black peppered moths have been found before 1845,
comes from genetic variation due to mutationthese were not found before these were rare and eaten by predators as easily found on the light bark of trees.Genetic variationdifferences in sequences of genes between individual organisms of a species.specific mutation turned moths black during the Industrial Revolution in 1845 in order to survivethe bark of trees become dark and light moths were easily found.before 1845 bark of trees were light so black moths were visible to birds eat them so they become rare.Thus, No black peppered moths have been found before 1845,
come from genetic variation due to mutationthese were not found before these were rare and eaten by predators as easily found on the light bark of trees.Learn more:
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What is the importance of cells being able to to take in nutrients for survival and waste product excretion for homeostasis
Cells require energy to power their biochemical processes such as transcription and translation processes. The nutrients taken in by cells are broken down and the energy in these bonds is used to create ATPs, the energy currency of the cells.
During the breakdown of these nutrients for energy, in a process called cellular respiration, the byproducts produced need to be excreted from the cell. This is because the accumulation of these byproducts may be toxic to the cell.
The part of plants that contains structures needed to absorb sunlight and carbon dioxide is the
The part of plants that contains structures needed to absorb sunlight and carbon dioxide is the chloroplast. Chloroplast would be the part in a plant to where it would absorb and be attracted by sulight and carbon dioxide.
Which of the following statements describes chromatin?
A) Heterochromatin is composed of DNA, whereas euchromatin is made of DNA and RNA.
B) Both heterochromatin and euchromatin are found in the cytoplasm.
C) Heterochromatin is highly condensed, whereas euchromatin is less compact.
D) Euchromatin is not transcribed, whereas heterochromatin is transcribed.
E) Only euchromatin is visible under the light microscope.
Answer:
The correct answer y C).
Explanation:
Chromatin is the association between DNA and proteins called histones.
Heterochromatin is highly condensed because in that state the union between DNA and proteins is very strong and they are very close.
Euchromatin is less compact because in that state the union between DNA and proteins is weak and they are less stuck together.
Heterochromatin is not transcribed, whereas euchromatin is transcribed because when the union between DNA and histones is very strong, DNA is in a very compact state and the transcription machinery (RNA polymerase, transcription factors, etc.) cannot access the DNA to be able to transcribe it.
Chromatin, a complex of DNA and proteins, exists in two forms: heterochromatin, which is highly condensed, and euchromatin, which is less compact and actively transcribed.
Explanation:The statement which most accurately describes chromatin is C) Heterochromatin is highly condensed, whereas euchromatin is less compact. Chromatin is a complex of DNA and proteins within the cell nucleus, and can be found in two different forms: euchromatin and heterochromatin. Heterochromatin is a form of chromatin that is densely packed and often associated with areas of the DNA that are not being actively transcribed into RNA. On the other hand, euchromatin is less condensed and represents regions of DNA that are actively being transcribed. So, heterochromatin is highly condensed, while euchromatin is less compact.
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Blackwater is cheaper and easier to process than greywater. Please select the best answer from the choices provided T F
False! Greywater is easier to treat and process than blackwater.
It is a false statement that "Blackwater is cheaper and easier to process than greywater."
What is black water and grey water?The term black water refers to waste water that emanates from the sewers such as from bathrooms, kitchens, toilets etc. Grey water is water that is obtained from sinks and from the washing machine which is less in pathogen content.
It is easier to treat grey water than black water since grey water contains less microbial load than grey water.
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In a family, the father is affected by a genetic disorder. The son in the family has the same disease, but the daughters do not have it. What type of inheritance is this?
A. Y-linked
B. X-linked
C. polygenic
D. codominant
Answer: Option A Y-linked
Explanation:
Y-linked traits are the ones which are due to the alleles present on the Y chromosome of an organism.Since, only the male members carry the Y chromosome, the traits linked to Y chromosome only pass down from the father to the sons and never to the daughters, such type of inheritance is known as Y linked inheritance.According to the question, the inheritance cannot be X linked because every daughter inherits one X chromosome from the father but the sons only inherit the Y chromosome. Thus, an affected male cannot produce affected sons if the trait is X linked.A polygenic trait is the one whose phenotype is determined by more than one genes, which again is not the case here.A co-dominant trait is the one which is determined by both the alleles i.e the phenotype is determined by both the alleles of a gene and none of the alleles is completely dominant over the other.As can be seen from the question, the affected father is producing an affected son and no affected daughter, thus this inheritance is Y linked.
What characteristic makes osmosis different from diffusion? Question 6 options: Net movement in osmosis is from areas of higher water concentration to areas of lower water concentration. Net movement in diffusion occurs from areas of higher solute concentration to areas of lower solute concentration. Osmosis occurs through a permeable membrane. Diffusion must occur through a semipermeable membrane. Osmosis requires facilitation by an energy-carrying molecule, such as ATP. Diffusion requires no additional energy to move molecules across the concentration gradient. Osmosis is used for gases, such as oxygen and carbon dioxide. Diffusion is used for water that contains salt or sugar molecules.
Answer:
the first one
Explanation:
Earth's surface does not receive the same amount of solar energy everywhere. Earth receives more total yearly energy near the equator, and less energy near the poles. What is the reason for this? A. Earth's tilting on its axis B. hurricanes forming over the ocean C. Earth's land and water heating up unevenly D. deep ocean and surface currents forming in the ocean
A
The Earths axis is tilted approximately 23.5 degrees (which is the reason the Earth experiences seasons).
I did this one time ANd Its A can you mark me as brainlest really need it
A deep water island of marine debris is located directly in the migratory path of a pod of humpback whales. How would this affect the carrying capacity of this population of humpback whales?
The presence of marine debris can impact the carrying capacity of humpback whales by causing entanglement, ingestion issues, and disrupting feeding behaviors.
Carrying capacity refers to the maximum population size that an ecosystem can sustain indefinitely. If a deep water island of marine debris is in the migratory path of humpback whales, it could potentially affect their carrying capacity by causing entanglement in debris, ingestion of plastics leading to health issues, and disrupting their feeding behaviors.
The amount of ____ that a food contains is measured in calories.
Fat,
Energy,
Protein,
Carbohydrates
Carbohydrates because a calorie is the carbohydrate. A carbohydrate is made up of protein and fat.
The insertion of a human DNA fragment into a bacterial cell might make it possible for what
The insertion of human DNA into bacterial cells enables these cells to produce medicinal proteins such as insulin and clotting factors, advancing the treatment of genetic diseases and revolutionizing biotechnology.
The insertion of a human DNA fragment into a bacterial cell can transform the bacterium into a tiny factory that produces medicinal proteins. This process, enabled by recombinant DNA technology, involves introducing a desired piece of DNA into a bacterial host using plasmids or bacteriophages as vehicles. Once inside, the foreign DNA can lead to the production of insulin, clotting factors, enzymes, hormones, vitamins, antibodies, and vaccines, significantly advancing the treatment and potential cures for various genetic diseases.
Examples of successful applications include the synthesis of tissue plasminogen activator in E. coli to aid heart attack victims and vaccines against diseases like hepatitis B. The technique not only contributes to medicine by producing vital therapeutic proteins but has also revolutionized biotechnology by allowing for precise genetic modifications.
B: What is the relative humidity if the dry-bulb temperature is 16°C and the wet-bulb temperature is 10°C?
45% is the answer for your question
45% is the relative humidity if the dry-bulb temperature is 16°C and the wet-bulb temperature is 10°C.
What is Psychrometer?Psychrometer is a device that use to calculate the relative humidity and dew. It has two thermometer, one measures the dry temperature while another measures the wet-temperature.
The amount of water vapor in the air, represented as a proportion of the highest quantity of water vapor the air could contain simultaneously temperature, was known as humidity levels, referred as relative humidity.
Calculation of relative humidity.
It can be calculated as:
Relative humidity = Actual vapor / saturation vapor density × 100
Relative humidity = 14 / 18 × 100
Relative humidity = 0.7777 × 100
Relative humidity = 77%.
Therefore, the relative humidity will be 77 %, and 45% is the relative humidity if the dry-bulb temperature is 16°C and the wet-bulb temperature is 10°C.
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Which of the following statements accurately describes melanin's function?
a. The more melanin an individual has in his or her skin cells, the more likely he or she is to get mutations in DNA.
b. Melanin is a molecule that distinguishes humans from their primate relatives.
c. Everyone has the same type of melanin, but the amount varies from person to person.
d. Lighter skin has less of the dark-brown eumelanin that protects cells from UV damage.
Answer: Lighter skin has less of the dark-brown eumelanin that protects cells from UV damage.
Explanation: There are 2 different types of melanin so this is the right answer.
Detergents are compounds that dissolve lipids. If a cell were exposed to large concentrations of detergents, which cell part would likely suffer the greatest?
Ans.
Detergents are chemical compounds having both polar and non-polar components. They cause disruption of lipid molecules by breakdown bonds present between lipid molecules. In a cell, lipids are majorly present in cell membrane and membranes of internal cell organelles.
Thus, 'the cell part that would most likely suffer due to exposure to high concentration of lipids is cell membrane.'
Which reflex is NOT controlled by the brain stem?
A. urination
B. vomiting
C. sneezing
D. swallowing
E. salivating
Hai :3
Your question is related to physiology.
Of all your choices, urination is not controlled by the brain stem. Urination is controlled by the micturition reflex, so your answer would be A. urination.
The reflex that is NOT controlled by the brain stem is salivating.
Explanation:The reflex that is NOT controlled by the brain stem is salivating.
The brain stem is responsible for controlling many automatic reflexes that are essential for survival. These include urination, vomiting, sneezing, and swallowing. However, salivating is controlled by a different part of the nervous system called the autonomic nervous system.
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Amino acids are used to build
.
Just like a Lego house is made of bricks, proteins are made up of lots of tiny building blocks. These building blocks are called amino acids. To build a protein, first the amino acids are connected into long chains.
Sorry if this doesn't help or if its wrong.
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Describe how proteins synthesized in a cell are packaged, modified, and exported out of the cell. Be sure to include the contribution of the endoplasmic reticulum, the golgi apparatus, and the cell membrane in this process.
Help ASAP. Please and thanks :)
The proteins are synthesized by the ribosomes through the process of translation and are located in the lumen of the cisternae in the rough endoplasmic reticulum. These proteins are then pinched off from the cisternae in the form of vesicles. Vesicles are the small, membrane-enclosed envelops produced by the endoplasmic reticulum and the Golgi apparatus. They are then carried to the Golgi apparatus, where in, they are packed and transported out by the secretory vesicles pinched by the Golgi. It is delivered to the cytoplasm and reaches the cell membrane of the cell where they are released outside the cell. Lysosomes digest and recycle the waste materials produced in this process.
Proteins synthesized in a cell go through a series of processes to be packaged, modified, and exported. They start in the endoplasmic reticulum, where modifications and packaging into vesicles occur. The vesicles then travel to the Golgi apparatus for further modifications and sorting before being transported to the cell membrane for exocytosis.
Explanation:Proteins synthesized in a cell undergo a series of processes to be packaged, modified, and exported out of the cell. First, the newly synthesized proteins are transferred into the endoplasmic reticulum (ER), where they undergo modifications such as folding and the addition of sugar molecules. The ER also packages the proteins into vesicles, which are then transported to the Golgi apparatus.
In the Golgi apparatus, proteins undergo further modifications and sorting. They are packaged into different types of vesicles, depending on their final destination. The vesicles then bud off from the Golgi apparatus and are transported towards the cell membrane.
Once the vesicles reach the cell membrane, they fuse with it, allowing the proteins to be released outside of the cell. This process is known as exocytosis. The proteins are then free to carry out their functions in the extracellular space or in other cells.
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The rock cycle????
A) Destroys and create rock
B) Changes and recyclers Earth’s rocks
C) Happens once every million years
D) Changes all rocks into igneous rock
B) Changes and recyclers Earth's rocks
Explanation:In earth, there a 3 kinds of rocks available namely volcanic, sedimentary, and igneous. These diverse rock types can be changed into each other.
Sedimentary rock can wind up molten, transformative or another sedimentary rock, igneous rock can end up volcanic, sedimentary or another changeable rock and molten rock can end up sedimentary, transformative or another volcanic rock. This type of interconversion is explained by rock cycle.
This conversion occurs through natural phenomenon such as erosion, melting, weathering, effect of heat and pressure, etc.
The correct answer is option E.The gemstone cycle is a natural, nonstop planetary process that involves the conformation and metamorphosis of jewels. It operates through mechanisms similar as riding , corrosion, deposit, and heat or pressure changes, cycling material between igneous, sedimentary, and metamorphic jewels.
The Rock Cycle
The gemstone cycle is a natural and nonstop process that describes the conformation, breakdown, and reformation of jewels. This cycle can involve changes below and over Earth's face and is driven by both Earth's internal heat and the sun's energy. The cycle includes three main types of jewels Igneous gemstone- Formed from the cooling and solidification of magma or lava. Sedimentary gemstone- Made from the contraction of sediments which can include fractions of other jewels and organic material. Metamorphic gemstone- Created when being jewels are altered by heat, pressure, or chemical processes. These gemstone types are connected as igneous jewels can break down into sediments that may form sedimentary jewels, or they can be subordinated to conditions that change them into metamorphic jewels. also, sedimentary and metamorphic jewels can be upraised and eroded or subducted and melted to begin the cycle again as magma. The processes of the gemstone cycle include riding , corrosion, deposit, contraction, crystallization, and metamorphism. It's important to understand that this cycle doesn't destroy jewels but rather recycles them, and it can take hundreds to millions of times for these changes to do.
Some cells, like mature nerve cells or muscle cells, do not divide. other cells will divide only when the cellular environment signals that it is necessary. according to model 1, what "phase" of the cell cycle are these cells said to be in when they are not dividing or planning to divide?
Synthesis is when they are not dividing
Cells not dividing are in the G0 phase, a quiescent state where they remain inactive until certain conditions or signals prompt them to enter the G1 phase; some cells may remain in G0 permanently.
Cells that do not divide, such as mature nerve cells or muscle cells, or cells that divide only under certain conditions, are said to be in the G0 phase (pronounced 'G-zero'). In this phase, cells are in a quiescent (inactive) state, having exited the cell cycle. Certain cells may temporarily enter the G0 phase due to environmental conditions or lack of growth signals, and will only proceed to the G1 phase upon receiving an external trigger. Cells like mature cardiac muscle cells and nerve cells may remain permanently in the G0 phase, ceasing to divide.
What are the negative effects of rising ocean temperatures? Check all that apply.
the melting of glaciers and polar ice caps
the drying out of fertile land and the formation of dust bowls
the flooding of low-lying coastal areas
the faster evaporation of water in the soil
the decreased frequency of major storms
Answer:
Option (1) and (3)
Explanation:
The ocean covers a large portion of earth and the temperature of the ocean rises due to the high absorption of heat. This is because of the higher amount of incoming solar radiation and the increasing green house gases in the atmosphere of the earth.
This increasing temperature of the ocean has certain negative effects.
Due to the increasing ocean temperature, the ocean water will become warm that will enhance the temperature of the polar water, as a result of which the glaciers and ice caps of the polar region will melt.
The increasing ocean water temperature will lead to the evaporation of water into the atmosphere, which will eventually cause rainfall. This will cause flooding in the low-elevated coastal areas. There occurs increasing frequency of major storms.
Thus, the correct answers are options (1) and (3).
Answer:
the flooding of low-lying coastal areas
option b
Explanation:
edge 2024!
11. Mendel predicted that there are “units of heredity” which we now call __________. 12. A version or variant of a gene that produces a specific trait is called an _________. 13. A recessive phenotype can only be displayed if the genotype is heterozygous. 14. The chromosomes that underwent ____________________ during meiosis are called recombinant chromosomes, because they contain a region that has recombined to form a new pair of alleles. 15. When genes do not assort independently, the genes are said to be _________________ on the same part of the chromosome so they get passed on together. 16. A ____________ is a segment of DNA on a chromosome that codes for a particular trait. 17. Most sex-linked genes are on the____ chromosome, simply because they are built of much more DNA. However, _________ are more likely than _________ to exhibit sex-linked traits.
Genes are the units of heredity predicted by Mendel. An allele is a variant of a gene that determines specific traits. Homozygous recessive genotypes display recessive phenotypes while heterozygous do not. Recombinant chromosomes, resulting from crossing over during meiosis, contain new pairs of alleles. Genes that do not assort independently are said to be linked. A gene codes for a specific trait. Most sex-linked genes are on the X chromosome, and females are more likely to exhibit these traits than males.
Explanation:11. Mendel predicted that there are “units of heredity” which we now call genes.
12. A version or variant of a gene that produces a specific trait is called an allele.
13. A recessive phenotype can only be displayed if the genotype is homozygous recessive, not heterozygous.
14. The chromosomes that underwent crossing over during meiosis are called recombinant chromosomes, because they contain a region that has recombined to form a new pair of alleles.
15. When genes do not assort independently, the genes are said to be linked on the same part of the chromosome so they get passed on together.
16. A gene is a segment of DNA on a chromosome that codes for a particular trait.
17. Most sex-linked genes are on the X chromosome, simply because they are built of much more DNA. However, females are more likely than males to exhibit sex-linked traits.
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What system is responsible for defending the body against harmful substances? A.Circulatory system b.Musclar system c.Endocrine system d.Immune system
The right option is; d. Immune system
The immune system is responsible for defending the body against harmful substances.
The immune system is the body’s defense system that protects the body against infectious pathogens and other invaders. The immune system is composed of many biological structures (special cells, proteins, tissues, and organs) and processes that functions together to protect the body. White blood cells are one of the important cells of the immune system that destroy harmful substances or disease-causing organisms that invade body systems.
If a scientist collects evidence that questions the basics of a scientific theory, this means the theory is
A) flawed to the point of being invalid
B) going to be refined by further investigation
C) going to be proven wrong
D) not based on fact or evidence
which part of a cardinals niche helps limit the size of the sunflower population in its ecosystem ? PLZZ HELP
The cardinal's niche helps limit the size of the sunflower population in its ecosystem through several factors: 1. Seed dispersal 2. Predation control 3. Pollination assistance 4. Habitat modification
1. Seed dispersal: Cardinals are known to eat sunflower seeds and then disperse the undigested seeds in different locations through their droppings. This helps to spread the seeds across a wider area, reducing competition among sunflower plants and limiting their population density in any one particular area.
2. Predation control: Cardinals are predators of insects and small animals that may prey on sunflower plants or their seeds. By feeding on these potential pests, cardinals help keep their population in check and prevent them from negatively impacting the sunflower population.
3. Pollination assistance: Cardinals are attracted to the bright colors and nectar of sunflowers. As they visit the flowers to feed, they inadvertently transfer pollen from one flower to another, aiding in the process of pollination. This promotes healthy reproduction and genetic diversity among sunflower plants, which can help regulate their population size.
4. Habitat modification: Cardinals often create nests in the branches of trees and shrubs near sunflower patches. Their presence and activities can modify the surrounding habitat, making it less suitable for sunflower growth or limiting the availability of resources necessary for sunflower survival. This indirectly affects the size of the sunflower population.
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The cardinal's niche limits the sunflower population in its ecosystem through its role as a seed predator, consuming the seeds and hence reducing the number of seeds available to grow into new sunflower plants.
Explanation:The part of a cardinal's niche that helps limit the size of the sunflower population in its ecosystem is its role as a seed predator. Cardinals are known to feed on the seeds of a variety of plants, including sunflowers. This consumption of seeds reduces the number of seeds that are able to germinate and grow into new plants, potentially limiting the population size of sunflowers in the ecosystem where the cardinals live.
Similar to the Karner blue butterfly and the wild lupine in its oak-pine barren habitat, the cardinal's influence on its ecosystem is an example of population ecology, the study of how the numbers and distribution of organisms in an ecosystem change over time based on factors like available resources and interactions with other species.
Thus, by feeding on sunflower seeds, cardinals can play an important role in maintaining the balance of their ecosystem and controlling the population size of sunflower plants.
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