Question

Concepts related to theory of evolution are listed below, which are the key concepts of Darwinian Theory?
i) Single step large mutation
ii) Speciation due to mutation
iii) Inheritance of Acquired characters
iv) Branching descent
v) Natural selection

• A. i, ii
• B. iii, iv
• C. ii, iii
• D. iv, v

Answer 1

The correct option is D iv, v

Darwinism is an original theory explained by Darwin (1859). He said that new species form as a result of continuous variations. Variations are of two types- Continuous variations and Discontinuous variations(these variations are termed as sports by Darwin and mutations by Hugo de Vries). Darwin talked about continuous variations and said that variations accumulate in individuals. Darwin thought that the adaptations result mainly due to a single, source, i.e, natural selection. Darwinism does not believe in isolation.

So the correct option is "(iv),(v)".