All categories

3 years ago

Which statement about natural selection is true?

2 answers:

3 0

Answer: c.Natural selection is the process by which organisms with more beneficial traits are more likely to survive and reproduce.

Natural selection is the differential survival and reproduction of individuals because of differences in the phenotype. Phenotypic characteristics favors the survival of some organisms in the population better than others. Example given by Darwin population of colored beetles green and red belonging to same species. Green ones mimic the color of grass not noticed by birds but red ones were noticed and eaten by birds. This is the selection by nature for better suited individuals. Green color gave the survival advantage to these beetles which is a phenotypic characteristic therefore, they will produce more offsprings than the red ones and also pass on the phenotypic trait to their offsprings.

natka813 [3]3 years ago

3 0

Natural selection is a way of selecting certain organisms naturally that consists of specific features making them capable of better adapting and surviving in a particular environment.

Further Explanation:

In 1859, Charles Darwin introduced the theory of natural selection to provide an explanation of adaptation and speciation. According to the theory, the useful variations or mutations in the genome of an individual would help him/her to better adjust in the surrounding environment and therefore, such variations are selected as such. This results in better survival capacity of an individual and also leads to passing on the variations to future generations through reproduction. The environmental conditions keep on changing with time. In order to survive in the changing environment, the organism’s genome keeps on undergoing mutations so as to produce useful traits to be able to cope in such surroundings. The traits which in turn help the organism to adapt the environmental conditions are selected naturally compared to the traits of other organisms that are less useful. These variations are called advantageous variations that allow an individual to remain and reproduce better so as to increase its number.

The organisms differ among each other in a population due to random mutations that take place within their genome. Sometimes these mutations are passed on to their offspring as they are important for the survival of the progeny. As the environment changes, an individual also undergoes changes in order to adjust itself with the changing conditions. For example, in an extremely cold environment, certain organisms bring about changes in their genome and with time have produce fur so as to protect themselves from the cold. There are certain other organisms who could not adapt in such a colder environment and therefore, became extinct. Thus, natural selection is defined as a process wherein useful adaptation is favoured and the fittest organism depending on the environmental conditions survives and reproduces.

Learn More:

1. Learn more about the effects of vigorous exercise on cardiorespiratory system brainly.com/question/1209683

2. Learn more about the structure of epithelium and connective tissue brainly.com/question/4557690

3. Learn more about the secondary function of the lymphatic system brainly.com/question/2909254

Answer Details:

Grade: Secondary School

Chapter: Theory of Natural Selection

Subject: Biology

Keywords:

Natural selection, traits, adaptation, variation, mutations, reproduction, environmental conditions, random mutations, genome.

You might be interested in

Nancy suffer from insulin dependent diabetes mellitus and is on insulin therapy. You administered her insulin dose orally and re

maxonik [38]

Answer: Insulin is a hormone, which is secreted by the pancreas to regulate the sugar levels in the bloodstream.

Explanation:

Insulin is a protein hormone if take orally, will get digested in the digestive tract, it will not be able to affect the target site of action.

Insulin gets denatured in the digestive tract. Thus it will not be able to control the blood sugar levels.

Nancy has taken the insulin dose orally, the insulin will get denatured in the digestive system, it will not function and Nancy will remain hyperglycemic after the consumption.

5 0

3 years ago

You determine that you have only three copies left of an important DNA fragment, so you decide to amplify it. Using flanking pri

kicyunya [14]

Hello. This question is incomplete. The full question is:

"You determine that you have only 3 copies left of an important DNA fragment, so you decide to amplify it. Using flanking primers, how many PCR cycles would you have to run to generate over one billion (10^9) copies of the fragment? "

Answer:

Approximately 29 cycles of PCR would be required.

Explanation:

As you may already know, PCR is a technique used in molecular biology that allows part of a DNA molecule to be recycled into millions of copies.

PCR allows this replication to be done through cycles. Each PCR cycle lasts about 2 minutes and allows the DNA molecule to undergo the separation of the strands, the binding of the primers and the synthesis of new DNA strands through DNA polymerase. This cycle is usually repeated 32 times, but this number may change depending on the number of copies the researcher thinks is necessary.

In this case, if a researcher wants 10 ^ 9 copies of DNA, he must do the following calculation to find the number of PCR cycles needed:

32 ^ x = 10 ^ 9

x = 28.3 = approximately 29 cycles.

4 0

3 years ago

Why are coral reefs home to a huge diverse variety of species?

kirza4 [7]

I think the answer is A.

7 0

3 years ago

Read 2 more answers

Enzymes what do they do? what are they made of? how do they work?

MatroZZZ [7]

To break a protein down into its amino acids you will need enzymes. Enzymes are biological molecules (proteins) that act as catalysts and help complex reactions occur everywhere in life. Let's say you ate a piece of meat. Proteases would go to work and help break down the peptide bonds between the amino acids.

5 0

3 years ago

Reactions that consume CO2 take place in?

Jet001 [13]

Answer:

The Stroma of the chloroplast.

Explanation:

This answer is correct

3 0

3 years ago