Evolution means
History of race
Development of race
History and development of race with variations
Progressive development of the race
Assertion : Human ancestors never used their tails and so the tail expressing gene has disappeared in them.
Reason : Lamarck's theory of evolution is popularly called theory of continuity of germ plasm.
Contribution of scientist :
$(a)$ Charles Darwin
$(b)$ Lamarck
$I.$ Use and disuse of organs
$II.$ Inheritance of acquired characters
$III.$ Branching descent
$IV.$ Natural selection
$V.$ Mutation
$VI.$ Reproductive isolation
The two key concepts of Darwinism from the given options are
Write short note on Darwinism.