Question

Theory of pangenesis is connected with
A. Inheritance
B. Origin of variations
C. Continuity of germplasm
D. Struggle for existence

Answer 1

Hint: There are so many scientists who proposed so many theories for the evolution of life. Among them, a theory of pangenesis is one of the most important theories. Which was proposed by the most renowned scientists Charles Darwin. He said some exclusive things about the theory of pangenesis in the nineteen century.

Complete answer:
In 1868 in England, Charles Robert Darwin planned his pangenesis theory to explain the units of inheritance between folks and offspring and also the processes by which those units manage development in offspring. Darwin coined the idea of gemmules, that the same-named hypothesized minute particles of inheritance thrown off by all cells of the body.
Pangenesis theory originated from the claim that characteristics non heritable throughout AN organism's life were inheritable. A theory of inheritance of non heritable characteristics (IAC) had persisted for pretty much 2 thousand years, since Greek antiquity. For instance, Hippocrates, WHO lived throughout the fifth to fourth centuries BCE in Hellas, that later became the Hellenic Republic, used this theory to clarify why some folks had longer than traditional heads. Hippocrates stated the same that some folks by custom treated their youngsters in the simplest way that the youngsters developed long heads as they grew. He thought that nature would reinforce this practice when several generations, so that notwithstanding folks stopped victimization bandages, the heads of their offspring would still grow long. Several scientists and philosophers within the eighteenth and nineteenth century favoured some type of IAC theory, together with Jean-Baptiste naturalist in Paris, France, Charles Lyell in London, England, and, to some extent, Charles Robert Darwin. Lamarck's contribution to the idea of IAC garnered for it the label Larmarckian. Naturalists explicit that each one of the characters are non heritable throughout a person's life transmitted to their offspring.

So A is the correct option.

Note: Charles Darwin demonstrated the theory of pangenesis which is related to astronomy. Because he said that some spore-like things are flying in the sky and come to earth and form a new life called a special evolution of life.it is also rejected after some years because of his embryological evidence.