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3 years ago

Has evolution by natural selection recently occurred in the worldwide populations of Mycobacterium tuberculosis?

Biology

1 answer:

Phoenix [80]3 years ago

6 0

Answer:

Yes

Explanation:

Evolution by natural selection has recently occurred in the population of Mycobacterium tuberculosis worldwide which can be seen now because the number of antibiotic-resistant mycobacterium is increasing and becoming high than non-resistant mycobacterium.

So due to natural selection, the resistant bacteria is selected because only resistant bacteria is having those allele which help them to survive in the presence of antibiotic. Now mycobacterium is becoming multiple drug-resistant which is a great matter of concern for doctors. Therefore the given statement is true.

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How does niche partitioning relate to biodiversity

son4ous [18]

These beetle species, which eat the same food and occupy the same habitat, coexist without any evidence of segregation or exclusion. ... However, niche differentiation is a critically important ecological idea which explains species coexistence, thus promoting the high biodiversity often seen in many of the world's biomes.

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4 years ago

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Consider the following three populations of birds. Assume HW equilibrium. With these birds red coloring is recessive, while brow

bixtya [17]

Answer:

Red allele frequency will be highest in population II

Population III can undergo bottleneck effect

The frequency of the brown allele will least likely be altered in the population I

Explanation:

Population I -

Total population - $670$

Brown birds - $603$

Red birds - $67$

Population II

Total population - $100$

Brown birds - $90$

Red birds - $10$

Population III

Total population - $30$

Brown birds - $27$

Red birds - $3$

Frequency of red birds in population I

$\frac{67}{670} = 0.1$

Frequency of red birds in population II

$\frac{10}{90} = 0.11$

Frequency of red birds in population III

$\frac{3}{30} = 0.1$

Red allele frequency will be highest in population II and it will be equal to $\sqrt{0.11} = 0.33$ as compared to $0.31$ in case of population I and III

Population III can undergo bottleneck effect because of smaller population size

The frequency of the brown allele will least likely be altered in the population that has highest brown individual , i.e population I

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4 years ago

A manual contains instructions for how to build a variety of structures using a set of interlocking bricks. If this scenario is

liraira [26]

C, the manual is a chromosome

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3 years ago

DNA is coiled into___.Proteins called____and help to keep the DNA___.

Sav [38]

Answer:

"In the nucleus of each cell, the DNA molecule is packaged into thread-like structures called chromosomes. Each chromosome is made up of DNA tightly coiled many times around proteins called histones that support its structure"

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Explanation:

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