Scientists believe that evolution is gradual. But extinction, part of evolutionary story, are 's

English

Gujarati

Hindi

6.Evolution

medium

The scientists believe that evolution is gradual. But extinction, part of evolutionary story, are 'sudden' and 'abrupt' and also group-specific. Comment whether a natural disaster can be the cause for extinction of species.

Option A

Option B

Option C

Option D

Solution

Natural disaster like earthquake can cause extinction of species.

During the long period since the origin and diversification of life on earth there were five episodes of mass extinction of species.

Sudden extinction of highly flourished dinosaurs of Jurassic period of Mesozoic era in Cretaceous period ither due to hitting of the earth by an iridium rich meteorite or due to global cooling.

Standard 12

Biology

Theory of natural selection was given by

medium

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.

medium

(AIIMS-2005)

Branching descent and natural selection are the two key concepts of ……….. theory of evolution.

medium

The idea of use and disuse of organs was given by

medium

Contribution of scientist :

$(a)$ Charles Darwin

$(b)$ Lamarck

medium

The scientists believe that evolution is gradual. But extinction, part of evolutionary story, are 'sudden' and 'abrupt' and also group-specific. Comment whether a natural disaster can be the cause for extinction of species.

Solution

Similar Questions

Theory of natural selection was given by

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.

Branching descent and natural selection are the two key concepts of ……….. theory of evolution.

The idea of use and disuse of organs was given by

Contribution of scientist : $(a)$ Charles Darwin $(b)$ Lamarck

Start a Free Trial Now

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