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3 years ago

Explain control group

2 answers:

5 0

<span>A control group in a scientific experiment is a group separated from the rest of the experiment where the independent variable being tested cannot influence the results. This isolates the independent variable's effects on the experiment and can help rule out alternate explanations of the experimental results.</span>

Snezhnost [94]3 years ago

3 0

A control group is a part of an experiment that nothing is done to. It is used to compare the results of what happens in other groups where different parts of the experiment are changed to what would have happened had nothing been done.

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Which is the healthiest

alina1380 [7]

C. polyunsaturated fats

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2 years ago

Bees with short tongues are able to obtain nectar from deep flowers by drilling holes in the base of the flower without visiting

Nuetrik [128]

Answer:

The proportion of plants with deep flowers in future generations will decrease and will be very low.

Explanation:

To analyze this, we need to keep in mind the pollination process and the following general ideas:

Bees with long tongues can obtain nectar from deep flowers by visiting the top of them and extending their tongues to their bottom.
During their visit to the flowers and their search for nectar, long-tongued bees transport pollen from flower to flower, favoring pollination.
Bees with short tongues can obtain nectar from deep flowers by drilling holes in their base without visiting their tops.
Short-tongued bees do not need to access the nectar by the top of the flower. They do not get in contact with stamens, so they do not play a pollinator roll.
In a particular environment, bees with short tongues replace bees with long tongues.

In this particular environment, long-tongued bees used to visit plants with deep flowers to get their nectar. They used to get in contact with mature stamens and carry the pollen on their bodies to the next flower. During this process, long-tongued bees were able to ensure pollination and helped to keep a high reproductive rate of plants with deep flowers.

When shorted-tongue bees arrived at this environment, they were able to replace long-tongued bees. They also looked for the nectar of deep flowers, but instead of visiting them from the top, they were adapted to obtain nectar by drilling holes in the flower base. In this way, they missed the contact with mature stamens and pollen.

Long-tongued bees disappear, and short-tongued bees did not play a role in the pollination process of deep flowers, then the reproductive rate of these vegetable species probably started to decline.

Probably, with time, the proportion of plants with deep flowers in an environment dominated by short-tongued bees will be very low.

5 0

2 years ago

When many individuals with the same trait die before reproducing, what happens to the distribution of that trait in the populati

sattari [20]

Answer:

The distribution of that trait in the population will change, probably decreasing to near zero.

Explanation:

An evolutive force such as natural selection is acting on this population.

Natural selection is the result between the individual phenotype and the environment that determines the destiny of genes. It results in adaptation, which means the increase of the aptitude phenotype.

Aptitude (or fitness) is reflected by the phenotype that results in the survival, fertility, and capability of having a mate. Aptitude is the contribution of each genotype to the next generation. It is a way of measuring the individual ability to leave fertile offspring. Aptitude must be significant to the natural selection act in its favor.

Natural selection can act favoring an allele or against it, according to how it affects the fitness of individuals.

When many organisms in a population sharing the same trait die, this is because they did not have good fitness, so they were not adapted to the environment and its pressures. The alleles coding for that trait were not good for the fitness of the animals, so they do not get to survive.

These individuals die before reproducing, so they could not transfer their genetic charge to the following generation. Eventually, the alleles coding for the trait will decrease in the population, probably near zero. Natural selection is acting against this phenotype. Other alleles will be beneficiated, and their frequency in the population will increase.

This change in alleles frequency is what we call adaptation.

5 0

1 year ago

Which structures in the diagram are composed of RNA?

zavuch27 [327]

There is no diagram here, so I cannot answer.

7 0

2 years ago

Biochemical function within any cell is determined largely by specific enzymes. Remember, enzymes are proteins. Different sets o

lisabon 2012 [21]

The correct answer is: Differentiate

Every cell in a multicellular organism has an identical genome, and yet, there are various cell types. These varieties are the result of highly controlled modifications in gene expression (different sets of genes must be turned on and off).

Cellular differentiation almost never involves a change in the DNA sequence itself. Therefore, different cells can have very different physical characteristics regardless of having the same genome.

8 0

2 years ago

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