Question

Which one of the following phenomena supports Darwin's concept of natural selection in organic evolution?
a. Development of transgenic animals
b. Production of Dolly, the sheep by cloning
c. Prevalence of pesticide resistance insects
d. Development of organs from stem cells for organ transplantation

Answer 1

Darwin was a British Naturalist. He was the one who proposed the idea or concept of biological advancement by the natural selection process. As per his theory, he coined the term, evolution as the descent with modification. It means the species in due course of the time change and will be giving rise to the newer kind, but they do share a common ancestor between them. The mechanism that is stated by Darwin is the natural selection for the evolution of species.

Complete answer:
● In the context written above, we have come across wild situations and surroundings. Now, in that case, the species become resistant to that particular trait and inherit it in their internal gene.
● In the same way, the studies in science paved a path to the theory that the species once if they become resistant to the pesticide, then that supports the natural selection.
● For example, DDT is always believed as the most effective insecticide.
● Generally, it is used against household pests, insects, mosquitoes, etc. in the year 1945.
● But later on, within 2-3 years, the mosquitoes have become resistant to the new DDT chemical. And gradually, that trait transferred to their offspring.
● Gradually, the weaker mosquitoes whose situation became worse due to the DDT chemicals have entirely gone. Thus, a new species of DDT-resistant mosquitoes have taken birth as part of natural selection.
● The other options may be a bit confusing. But an in-depth analysis can help you eliminate the wrong ones. The dolly sheep have a gene transfer, but it did not become resistant to any of the traits. Natural selection occurs in long times based on the inclement conditions in the surroundings of the species.
● Stem cell theory has been recently approved and is playing a significant role in society.
● The development of transgenic animals will not fall into natural selection since the natural selection is the process where the species undergo severe conditions and become resistant to them in future times.

Hence, the correct answer is option (C).

Additional information:
Mr. Darwin proposed that the species undergo some variations and situations in such a way that they change their traits. The same altered characteristics will be transferred to their offspring too. Moreover, as per his observations and assumptions are taken, the frequency of changing the traits in the species magnifies rapidly in the later generations.

Note: Darwin's theory of Natural Selection has become a milestone in the history of bioscience. Darwin clearly explains the process, how the species evolve into their later versions. As we know the natural resources present on the earth are limited, and the population is amplifying rapidly. So, based on the survival conditions.