Question

According to the Pangenesis hypothesis of Darwin, all the somatic cells of the body not only multiply by cell division but also give off minute particles throughout their life cycle, called gemmules, which keep on wandering throughout the body.
REASON
It is explained by certain members of Porifera.
A. Both assertion and reason are correct and Reason is the correct explanation of the assertion
B. Both assertion and reason are correct, but the reason is not the correct explanation for assertion
C. Assertion is correct but the reason is incorrect
D. Assertion is incorrect but Reason is correct

Answer 1

Hint: In every field, various theories are proposed by different scientists in order to understand the various aspects of growth and evolution. Charles Darwin is the father of evolutionary studies. Most of the work is based on phylogenetics.

Step by step answer:Darwin has done major contributions in the field of science. His various postulates, laws, and theories have laid the basis for major research work. Darwin believed in the inheritance of the characters which are acquired ones. He stated this in this hypothesis of Pangenesis. He told that all organs of the body of parents give of invisible seeds, which are transmitted during sexual reproduction. He also used this thesis to explain the inheritance of traits. According to him, each tissue in the body will give out some tiny gemmules which can be passed to sexual organs for copies. This was all his hypothetical mechanism of hereditary. This was not considered correct rather it was used to modify the present-day Mendel’s work. The reason stating the Porifera members depicts this is wrong. As the porifers are primitive sponges, they can only reproduce asexually.
So the answer is option C: Assertion is correct but the reason is incorrect

Note: Charles Darwin was a biologist. He gave the Origin of Species book considered to be the best-written book on evolution. He was the grandson of Erasmus Darwin who gave the Recapitulation theory on Ontogeny. Charles waited for almost 15 years to publish his work on evolution.