Answer:
A new study of plants that are reproduced by 'cloning' has shown why cloned plants are not identical. Scientists have known for some time that 'clonal' (regenerant) organisms are not always identical. Now researchers believe they have found out why this is the case in plants: the genomes of regenerant plants carry relatively high frequencies of new DNA sequence mutations that were not present in the genome of the donor plant.
Explanation:
A famous ________ is at the mouth of the Mississippi River
Answer:tributary
Explanation:
Ari drew a diagram to show organisms in an ecosystem. What did Ari draw?
Answer: food web
Explanation:
Ari drew a diagram to show organisms in an ecosystem. Due to this, he draws a diagram of the food web.
What is an Ecosystem?An ecosystem may be defined as a type of place or an area where individuals of different species live together and interact with one another for the purpose of food, shelter, and space along with a mating partner.
According to the context of this question, the food web is the diagram that is drawn by Ari in order to express numerous organisms in an ecosystem.
A food web may be characterized as the interconnection of the number of food chains with each other in order to form a web-like pattern. In this type of arrangement, one organism can hold more than one position.
Therefore, Ari drew a diagram to show organisms in an ecosystem. Due to this, he draws a diagram of the food web.
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A group of runners gathers every week to train for long-distance runs. Several students in your anatomy class are part of this group. Your classmates are curious about the physiological changes that occur with exercise. You do a little research in class and find several changes occur as exercise begins. Which of these correctly lists the changes that occur as exercise begins?
A) increased vasodilation, increased cardiac output, increased venous return
B) decreased vasodilation, decreased cardiac output, decreased venous return
C) increased vasodilation, decreased cardiac output, increased venous return
D) increased vasodilation, increased cardiac output, decreased venous return
Increased vasodilation, increased cardiac output, decreased venous return occurs during exercise.
Option D.
Explanation:Exercise is a condition where the body works more than normal, leading to more consumption of nutrients and oxygen in the active muscles of body. The exercise also produces a lot of carbon dioxide in the muscles.
The increase in carbon dioxide and the need of oxygen and nutrients in the muscles lead to the para sympathetic stimulation which leads to the increase in vasodilation. This increase in vasodilation leads to reduced peripheral resistance which in turn reduces the venous return.
While, heart has sympathetic stimulation which causes the heart rate to increase and as a result cardiac output to increase too. But due to reduced venous return, the stroke volume increases up to a certain limit from where it remains still, because of the reduced blood in heart.
Answer:
A) increased vasolidation, increased, cardiac output, increased venous return
Explanation:
did it on usatestprep
A certain population of bluebirds eats spiders as a major food source. Which of the following ecosystem changes would impact this population of bluebirds the most?
Answer:
Explanation:
Predators
Human activities
Answer:
an increase in the spider and insect populationExplanation:
How to make the Punnett square
Answer:
Genotype Phenotype
TT - 1/4 homozygous tall tree- 1/4
Tt- 2/4 heterozygous tall tree-2/4
tt-1/4 homozygous short tree-1/4
A person who was infected with many common diseases as a child will contain more of which of the following compared to a child who was not exposed to many diseases?
A) Memory cells that provide a specific defense
B) Memory cells that provide a nonspecific defense
C) monocytes that provide a specific defense
D) monocytes that provide a nonspecific defense
Answer:
the answer is C
Explanation:
the answer is C
Answer: monocytes that provide a specific defense
Explanation:
What process releases the least ATP per molecule of glucose for immediate cell use?
Answer:
Anaerobic respiration
Explanation:
Anaerobic respiration occurs releasing the ATP per molecule of glucose for immediate use by the cell. Anaerobic respiration is carried out in absence of oxygen. There are two forms of fermentation, alcoholic and lactic acid fermentation. In humans, lactic acid fermentation occurs in muscle cells during intense muscular activity.
C6H12O6 → 2C3H6O3 + 150 kJ
Answer the password
Answer:
What password?
Explanation:
Questions
The decay of uranium isotopes is used to provide what information about Earth's history?
The decay of uranium isotopes is used to provide information about the age of Earth.
Explanation:Isotopes of Uranium U-232, U-233 , U-234 , U-235 , U-236 , U-238 are used as fuel in nuclear reactors or as explosives for nuclear weapons. Uranium 238 is not very radioactive and it constitutes for nearly 99.3% of natural uranium on Earth and has the longest lifetime: its period is 4.5 billion years, about the age of Earth.
Use of radiometric dating techniques help in defining the age of substances (natural or man-made) using the known decay rates of radioactive elements. Each element has an individual decay rate and half life time.
Two Uranium isotopes (U-238 and U-235) are used for radiometric dating. Both the isotopes have different decay rates and half life period. Both are unstable and radioactive. Since two different isotopes produce two different decay clocks (one as a reference to other), it is beneficial in accurately determining the age of samples. The age of earth (rocks or other natural elements) can be easily determined using Uranium isotopes.
Answer:
yes i know its "the age of the earth" but in the question thing it doesnt have that the closest one i put is age of rocks but im not sure
Explanation:
pls help lol
The diagram shows genetic structures. Which label best represents the area marked Y?
Answer:
The area marked Y is the DNA.
Explanation:
As we can see in the diagram, The area labelled Y shows a double-stranded structure which is joined together from the centre. The structure of the DNA comprises of two strands which make up the backbone of the DNA. These strands are made up of sugar-phosphate backbones. The strands are joined together by the hydrogen bonding between the nucleotide bases. Hence, the structure Y is that of a DNA.
Explain what happened genetically in the insect population over time as the insects were exposed to pyrethroids.
Answer:
The insects developed pyrethroid resistance.
Explanation:
Pyrethroid Insecticides:
Pyrethroids are synthetic derivatives of the natural compounds, pyrethrins, produced by Chrysanthemum plants to prevent insect attacks.Pyrethrins work by locking sodium channels in the cell membrane. This inhibits nerve impulses and paralyses the insect, ultimately resulting in its death. In the 1940s, synthetic pyrethroid insecticides were first used on auricular crops. But till the 2000s, 100 of insect species were resistant. This occurred due to the fact that the allele for pyrethroid resistance increased throughout the population.Pyrethroid resistance developed to enable the insects to survive. Natural selection allowed an exponential transfer of insecticide resistance genes throughout the insect population.Three major mechanisms of resistance were identified by scientists:Increased expression of genes involved in toxin detoxification.Decrease in sensitivity of the target proteins (on which pyrethrins act).Decrease in the insecticide penetration through the cuticle.Answer:
B) The allele for pyrethroid resistance increased throughout the population.
Explanation:
The allele for pyrethroid resistance increased throughout the population. Variation exists. The allele for resistance remained as those insects not resistant died out. Over time the resistant allele in the populations increased.
Cancer is the product of a mutation that
A) causes the uncontrollable growth of cells
B) changes the structure of hemoglobin in the blood
C) brings out stunted growth and severe pain
D) causes a translocation in a pair of chromosomes
Answer: A) causes the uncontrollable growth of cells
Explanation: Cancer can eventually lead to a tumor which has a large mass
What are the five categories of adaptations?
Determining risk of possible genetic defects can occur before or after conception and includes all of the following approaches EXCEPT:
Group of answer choices
linkage analysis.
Amniocentesis.
karyotype analysis.
pedigree analysis.
chorionic villi sampling.
Answer:
Linkage analysis
Explanation:
Linkage analysis is the only example here that does not look at possible genetic risks, such as looking for abnormal chromosome structures (karyotype) or family history (pedigree analysis).
Instead, linkage analysis is used to narrow down the chromosomal location of a particular trait. That is, it is a method used to find segments of chromosomes that harbour a particular trait.
Empirical evidence is obtained using our human senses, which statement
best explains the importance of empirical evidence in science
A. This type of evidence is impossible to repeat.
o
B. This type of evidence is personal and unsupported,
o
C. This type of evidence can be checked by others,
o o
D. This type of evidence is provided by authorities,
The statement “This type of evidence can be checked by others” best explains the importance of empirical evidence in science.
Explanation:
There are all kinds of evidence used in science, but empirical evidence is obtained as a result of repeated experiments and observations. This evidence is used to either support or argue against a scientific theory. Empirical evidence is the preferred evidence since this kind of evidence can be peer reviewed, i.e. reviewed by other scientists and/or researchers. In other words, the experiment can be redone, and the evidence can be tested.
Identify the base in this acid-base reaction
2HC H202 + Mg(OH)2 → Mg(CH302)2 +2120
HC2H302
Mg(OH)2
Mg(C2H302)2
Answer:
[tex]Mg(OH)_2[/tex] is the base in the reaction.
Explanation:
[tex]Mg(OH)_2[/tex] which is Magnesium hydroxide is a base because of the presence of Hydroxide ion. The pH of this magnesium hydroxide is 10 approximately. It is a strong electrolyte and has less solubility. Because of less solubility it becomes a weak base. This magnesium hydroxide is called as Milk of magnesia.
Acetic Acid + Magnesium Hydroxide = Magnesium Acetate + Water
[tex]2HC_2H_3O_2 + Mg(OH)_2 = Mg(C_2H_3O_2)_2 + 2H_2O[/tex]
This is double displacement acid base reaction. Thus the reactant side must have an acid and an base. We could see that acetic acid is present hence Magnesium hydroxide must be the base involved in the reaction
Answer:B mg(oh)2
Explanation:
How do viruses replicate?
Answer:
When a virus get access into an accommodating host body , it infuses its genes into the host's cell and uses this medium to replicate itself in a large number
Explanation:
In nature, a virus can't replicate itself it replicate only with the help of the host cell.
Explanation:
The replication of the virus comprises six steps they are attachment, penetration, uncoating, replication, assembly, and release. Due to the absence of the reproductive organelles, the virus replicates only with the help of the host cell. They use the organelles of the host cell to replicate and injects its genetic material into a cell during attachment and penetration. After uncoating replication occurs. During the replication of the virus in a host cell, it produces a protein called the capsid. The total replicate cycle of a virus along with the host is called the lysogenic cycle.10. Cloud droplets form and grow as water vapor condenses onto hygro-
scopic condensation nuclei. Research has shown that the maximum
radius for cloud droplets is about 0.05 millimeter. However, typical
raindrops have volumes thousands of times greater. Explain how cloud
droplets become raindrops.
Answer:
According to collision- coalescence theory, formation of raindrop from cloud droplets occurs when cloud droplets collide and coalesce or stick together.
Explanation:
The only significant difference between a raindrop and a cloud droplet is that a raindrop consist of a velocity that is non-negligible during the fall.Larger droplets having higher terminal velocities fall faster and collide with smaller droplets. Often the cloud droplets stick together and coalesce to form a larger droplet. This starts a chain reaction where these bigger droplets fall even rapidly, collide with the other droplets in their path and merge with these droplets.The photograph Depicts a condition called syndactyly. Explain what might have happened during development to result in this condition
Answer:
Cells in between the toes did not undergo apoptosis during the development of the fetus resulting in webbed toes.
Explanation:
Which of these is an example of land contamination?
O
A. Desertification
* O
B. Garbage dump
O
C. Recycling bin
O
D. Deforestation
Answer:
B
Explanation:
desertification and deforestation are effect of land contamination and other environmental threats.
this is a recycle bin...and it wont harm anyone...It will recycle the grabage and...help our environment.
Garbage dump will contaminate our water ways with hazardous chemicals...and it will release green house gases like methane....and also when enough methane was produced it can even cause explosions...dont foget the bad odour.
If you find my answer helpful..mark it brainliest..
An example of land contamination is garbage dumps. The correct option is B. Garbage pollutes the land, water, and air.
What is contamination?Contamination is the state or presence of unwanted and undesirable things or elements that pollute, infect, or make dirty a place. Contamination can be of anything, and it affects both the place and the health of the people.
Garbage is the unwanted or filthy elements that have to dispose of carefully, but garbage dumping anywhere contaminates the land, water, and air.
Thus, option B. Garbage dump is correct regarding contamination of land.
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3. Which one of the following foods could be used to give your cells the greatest amount of
energy? A spoonful of sugar, a spoonful of fat, or a spoonful of protein.
Answer:
One or the other
Explanation:
I believe with full confidence it is protein but sugar could qualify as well
A Spoonfull of fat will the cells the greatest amount of energy because 1 gram of fat gives 9 calories while 1 gram of protein and carbohydrate gives 4 calories of energy respectively.
A falcultative anaerobic organism is able to perform aerobic respiration in the presence of oxygen and fermentation in the absence
of oxygen. An example of a falcultative anaerobic organism is brewer's yeast, which is used in the production of alcoholic
beverages. If sealed in a vessel containing oxygen gas, water, and sugar (glucose), the yeast will eventually deplete the oxygen
gas. As long as glucose is available, however, the yeast can still survive.
Brewer's yeast use oxygen preferentially because???
Please answer quick
Answer:
The answer is B. Hope this helps!
Brewer's yeast use oxygen preferentially because aerobic respiration is more efficient than fermentation.
What do you mean by fermentation?Fermentation is a metabolic process that produces chemical changes in organic substrates through the action of enzymes. In biochemistry, it is narrowly defined as the extraction of energy from carbohydrates in the absence of oxygen.
Fermentation is the process of sugars being broken down by enzymes of microorganisms in the absence of oxygen. Microorganisms such as bacteria and fungi have unique sets of metabolic genes, allowing them to produce enzymes.
Both types of fermentation require two primary components, a sugar supply and a bacterial culture; alcohol fermentation use forms of yeast, while lactic acid fermentation normally relies on lactic acid bacteria.
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Do my eyes have a faint fold?
Winds in our atmosphere are created as a result of which of the following processes?
A. Energy that is absorbed in the atmosphere
B. Gravitational attraction from the moon
C. Density of the air particles in the atmosphere
D. Uneven heating of the air in the atmosphere
Answer:
The correct option is D) Uneven heating of the air in the atmosphere
Explanation:
Wind can simply be described as air which is moving or which is in motion. The uneven heating of the Earth's surface caused by the sun is the reason why winds occur. The difference in pressure of one area to another area causes the air to move and cause wind. The air tends to move from an area of higher pressure to an area of lower pressure and such is the movement of the wind.
An albino woman has 8 children with the same ma. 5 of which are albino. What is the fathers genotype?
Answer:
3 is the father's genotype.
Explanation:
May this answer help you !!!!
If the diploid number in a liver cell is 52, how many chromosomes are there in the egg of this organism?
Answer:
there are 26 cell of the organism
Which of these is an agent of abrasion?
A. Rock pieces
B. Acid rain
C. High pressures
D. Plant roots
Answer:
A. Rock pieces
Explanation:
Abrasion is the breaking down and wearing away of rock material by the mechanical action of other rocks. Three agents of physical weathering that can cause abrasion are moving water, wind and gravity. None of those are agents of abrasion. But Rock pieces are a result of abrasion.
Rock pieces act as an agent of abrasion, which is a process of mechanical weathering caused by physical forces such as gravity, water, wind, or ice. Option A is correct.
Among the options given, rock pieces are an agent of abrasion. Abrasion is a type of mechanical weathering where one rock bumps against another, causing the surfaces to wear down over time. This can happen due to gravity, moving water, strong winds, or glacial movements.
When pieces of rock are moved by water or wind and collide with other rocks, they cause the surfaces to erode. For example, the ice in glaciers also cause abrasion when pieces of rock embedded in them scrape against the rock below.
Hence, A. is the correct option.
Examine the map above showing the acidity of rainfall across the USA. How might the distribution of the acidity be explained?
A.
The acidity of the rain decreases over the western half of the country because there is less rainfall there.
B.
The acidity of the rain increases over the eastern half of the country because evaporated water from the Atlantic Ocean affects the air's pH.
C.
The acidity of the rain is directly related to the amount of forested land in each region.
D.
The acidity of the rain increases over highly populated, highly industrial regions because of the accumulation of waste products in the air.
Answer: i think it is a
Explanation:
i took a test and i got 100%
Answer:
The acidity of the rain increases over highly populated, highly industrial regions because of the accumulation of waste products in the air.
Explanation:
Hope This Helps!!!!
need this asap no rocky
Answer:
carp
Explanation:
what is the evalution of managment
Answer:
Evolution of management is the concept that was developed in the early days of men when the realization was made that we must live in groups for the survival.
Explanation:
Since men saw and realized that they need to live in groups, mighty men in the past were able to organize the masses, share them into various groups. The sharing was done accord to the masses' strength, mental capacities and intelligence.The evolution of management section is mainly divided into four sections: Early Management ThoughtThe Scientific Management EraThe Social Person EraThe Modern Era