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butalik [34]
3 years ago
11

15 POINTS!! What is the purpose of a dichotomous key? (Select all that apply.)

Biology
1 answer:
postnew [5]3 years ago
3 0

The purpose of a dichotomous key is to identify organisms

Explanation:

A dichotomous key is a kind of a tool that guides to classify and identify different organisms.

This key as the name indicates - dichotomous- consists of two parts or options to identify a species.

The method utilizes a series of questions/answers with two possible outcomes.

Taxonomically, a dichotomous key is used to basically identify a species or an organism by its scientific name.

All of the natural elements like the plants, animals, birds, etc are identified using this key.

Types of dichotomous key includes nested, linked, branching tree etc.

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Suppose a population is carrying a condition controlled by two alleles: P (dominant) and p (recessive). Only homozygous individu
Virty [35]

<span>The answer is B. 72.25 percent.

The Hardy-Weinberg principle can be used:</span>

<em>p² + 2pq + q² = 1 </em>and <em>p + q = 1</em>

where <em>p</em> and <em>q</em> are the frequencies of the alleles, and <em>p²</em>, <em>q²</em> and <em>2pq</em> are the frequencies of the genotypes.

<span>The <em>p</em> allele (<em>q</em>) is found in 15% of the population:
q = 15% = 15/100
Thus, q = </span><span>0.15

To calculate the <em>P</em> allele frequency (<em>p</em>), the formula <em>p + q = 1</em> can be used:
If p + q = 1, then p = 1 - q
p = 1 - 0.15
Thus, </span><span>p = 0.85

Knowing the frequency of the <em>P</em> allele (<em>p</em>), it is easy to determine the frequency of the <em>PP </em>genotype (<em>p²</em>):
p² = 0.85² = 0.7225

Expressed in percentage, p² = 72.25%.</span>

7 0
3 years ago
Which term refers to the structure that forms the surface of a cell, separating its contents from the outside world?
Helga [31]
I think the answer is b
5 0
3 years ago
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Some health science sites may restrict employees from wearing perfume or other scents.
Verdich [7]

The given statement is true.  

Some of the health science sites may restrict employees from wearing perfumes or other fragrances because the chemicals in the fragrances can stimulate reactions ranging from headaches to palpitations of heart in some of the individuals who are sensitive to them, making it tough for them to work efficiently.  

With time, the individuals getting exposed to the chemicals present in the fragrances become more sensitized to them to the point that they can no longer tolerate any more exposure. This can initiate breathing issues, nausea, sneezing, disorientation, and in extreme situations, they can even go into shock.  


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3 years ago
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A species that humans bring to an area where it did not previously occur is a(an):_________
Tasya [4]

A species that humans bring to an area where it did not previously occur is a(an): exotic species.

Exotic species are those that exist outside of their native geographic range, also known as alien, nonnative, nonindigenous, or introduced species. Exotic species are those that people have purposefully or accidentally introduced into ecosystems outside of the ones in which they have evolved. These introductions undoubtedly happen regularly in nature.

For instance, the Japanese native Kudzu (Pueraria lobata) was brought to the United States in 1876. Due to either a lack of imported individuals or inadequate adaptation to the ecosystem they join, the majority of attempts to introduce exotic species are likely to be unsuccessful. However, some species have preadaptations that can help them thrive even more in a novel setting.

Learn more about exotic species here;

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During which stage of the cell cycle do Mitosis and Cytokinesis occur? (I will give brainliest?
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Answer:

Mitosis occurs in Interphase and cytokinesis occurs in Anaphase

Explanation:

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