Which statement describes the best way to prepare a microscope for safe transport back to a storage area?

In a population, surrounded with dark gray rocks, there lived 2 types of beetles, a gray beetle and a white beetle. In the start

Svetlanka [38]

Directional selection favors one of the extreme phenotypes over the other one. <u>Option C is correct</u>. Natural selection is the evolutive force, and 0.40, 0.40, and 0.20 are the new genotypic frequencies.

<h3>What is directional selection?</h3>

Directional selection is one type of natural selection. Let us remember that natural selection is an evolutive force.

Directional selection increases the proportion of individuals with an extreme phenotypic trait.

There must be a selective pressure or environmental pressure acting on populations to lead the species to increase the number of individuals expressing that extreme phenotype.

This selection presents more frequently in those cases in which interactions between living organisms and the environment modify in the same direction.

In the exposed example,

two original phenotypes ⇒ gray and white
substrate color ⇒ dark gray rocks
environmental pressure ⇒ birds preying on beetles

- Grey beetles managed to camouflage with rocks since their gray color was similar.

- White beetles were exposed on the dark gray rocks, so they were easily seen by birds.

- Predation by birds was an environmental pressure that had a stronger influence on the white phenotype.

Natural selection favored gray-colored beetles, who could survive and reproduce.

Assuming a diallelic gene expressing complete dominance codes for beetles color, we can suggest that the frequency of one of the homozygous genotypes increased, while the other decreased to near cero. Heterozygous individuals kept the allele coding for the white phenotype.

Among the options, <u>C is the correct one</u>. Natural selection is the evolutive force, and 0.40, 0.40, and 0.20 are the new genotypic frequencies.

You can learn more about natural selection and directional selection at

brainly.com/question/9830102

brainly.com/question/12226774

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2 years ago

As the individual body size of an organism increases, the population density for this organism in a given habitat tends to

sertanlavr [38]

As the individual body size of an organism increases, the population density for this organism in a given habitat tends to decrease.

<span>It has been shown that an inverse relationship between the size of an animal and its local abundance exist. Animals with larger body size have higher energetic requirements, resource exploitation, and susceptibility to predation and thus the competition is bigger. Yet, the density–body size relation depends on the physical complexity of the habitat and population of a species.</span>

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Scientist who studies the plant life in an environment

mr_godi [17]

A scientist who studies plants is called a botanist.

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Read 2 more answers

Which of the following can wear away the solid rock of a cliff over time

Gemiola [76]

Answer: Item WE012003: Both a small stream and ocean waves can erode the solid rock of a cliff over time. Neither a small stream nor ocean waves can wear away the solid rock of a cliff.

Explanation: hope this helps!

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Why is it important that scientists haven’t identified a lokiarcheota as a cell yet?

ANTONII [103]

It's important because we need the scientists to discover where it is. the lokiarchaeota is a main cause for infections, and diseases, and if we identify it, and study it, we may know how to cure certain diseases, and how to prevent them.

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