What is an effect of genetic drift on a gene pool?

Answers

Answer 1

Answer: Genetic drift is a random of sampling of alleles from the gene pool. if a chance of a forest fire for example kills all but two of the population, the maximum number of alleles two the individuals at as a single gene would be 4, if both heterozygous for different alleles, all the other ones would be lost and the remaining alleles would increase in frequency.

Answer 2

Answer:

Answer:

Genetic drift reduces the size of gene pool of the population.

Explanation:

Genetic drift is any chance event that results in changes in the allele frequency of a population. The event either fixes an allele on the particular locus or makes the population to lose that allele.

Hence, genetic drift changes the genetic frequency by removal of a particular allele or by fixing it in the gene pool. Both conditions lead to reduced genetic variations in the population. And since genetic drift reduces the size of the population, the gene pool of the population would also shrink due to loss of alleles from it.

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Which lines in this excerpt from Guy de Maupassant's short story "Boule de Suif" show that relations between most French and German people remained friendly despite the war?A. At the end of a short time, once the first terror had subsided, calm was again restored. B. In many houses the Prussian officer ate at the same table with the family. C. By the exercise of tact the number of men quartered in one's house might be reduced; and why should one provoke the hostility of a person on whom one's whole welfare depended? D. And foolhardiness is no longer a failing of the citizens of Rouen as it was in the days when their city earned renown by its heroic defenses. E. Out of doors, therefore, citizen and soldier did not know each other; but in the house both chatted freely, and each evening the German remained a little longer warming himself at the hospitable hearth.
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An example of human systems that work together to provide nutrients for the cells and tissues isA. digestive system and nervous system
B. circulatory system and nervous system
C. circulatory system and digestive sytem
D. nervous system and urinary system

Answers

Answer:

The answer is C

Typhoid fever is caused by bacteria in contaminated food or drink. In 1903, an outbreak of typhoid fever in Ithaca, New York, killed almost 80 people. In addition, more than 1,000 Ithaca residents became sick with the disease. The population shares the public water source. Which type of limiting factor was involved in the typhoid outbreak that occurred in Ithaca?density-independent factor

density-dependent factor

population-dependent factor

population-independent factor

Answers

Answer : Option B) Density - dependent factor.

Explanation : Typhoid outbreak is dependent of the density as the people of the region are getting the water from the same source so, the density of the area is also an influencing factor in spreading the disease. The bacteria is also getting transmitted from one human to other human too.

The type of limiting factor that was involved in the outbreak of typhoid fever that occurred in Ithaca was the density-dependent factor.

What is typhoid fever?

Typhoid fever is an acute bacterial disease caused by Salmonella enterica serotype Typhi, with worldwide distribution. The disease is directly associated with low socioeconomic levels, especially in regions with poor basic sanitation, personal and environmental hygiene.

With this information, we can conclude that the outbreak of typhoid fever depends on density, as people in the region are receiving water from the same source, therefore, the density of the area is also a factor that influences the spread of the disease.

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4. Which of the following statements about reinforcement is true?a. Reinforcement increases the number of intermediate phenotypes.
b. Reinforcement is a type of natural selection.
c. Reinforcement decreases the morphological difference between two incipient species.
d. Reinforcement is also called dispersive selection

Answers

The statements about reinforcement is true is that Reinforcement decreases the morphological difference between two incipient species.

Option C is correct.

How do we explain?

Reinforcement is described as a type of natural selection that occurs when two populations that are becoming reproductively isolated from each other start to develop preferences for mates from their own population.

This can lead to a decrease in the morphological difference between the two populations, as they become more adapted to each other's mating preferences.

In conclusion, reinforcement is a type of natural selection, not the other way around. Option d is incorrect because reinforcement is also called assortative mating, not dispersive selection.

Therefore option B is correct

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Your answer would be A

Squamous cell carcinoma and basal cell carcinoma are both cancers of cell tissue of the skin, lining of the blood vessels, respiratory, intestinal, urinary tracts, and other body systems. These carcinomas are found in what type of tissue?

Answers

Explanation:

A carcinoma is a type of cancer that develops from epithelial cells, specifically, a carcinoma is a cancer that begins in a tissue that lines the inner or outer surfaces of the body, and that arises from cells that originate in the endoderm , mesoderm and ectoderm, which are the germ layers during embryogenesis. Carcinomas occur when a cell's DNA is damaged or altered and the cell begins to grow uncontrollably and becomes malignant. It is derived from the Greek, καρκίνωμα, karkinoma, which means pain, ulcer or cancer (derived from karkinos meaning crab).

The two main groups of carcinomas are squamous cell carcinomas and adenocarcinomas.

Carcinomas are the most common type of cancer.

Common places of carcinomas are the skin, mouth, lung, breast, digestive tract and uterus.

Which phase of the cell directly follows metaphase

Answers

the phase that follows after metaphase is anaphase

What has led to the vast variation seen in flowers?a. Temperature
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b. Breeding
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Answers

I reckon it's pollinator attraction.

Answer:

pollinion atraction

Explanation:

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