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Given below are four statements (A – D) each with one or two blanks. Select the option which correctly fill ups the blanks in two statements.

  1. Wings of butterfly and birds look alike and are the results of (i) _____ evolution.
  2. Miller showed that CH4 , H2, NH3, and (i) ______ when exposed to electric discharge in a flask resulted in formation of (ii) _______.
  3. Vermiform appendix is a (i) _______ organ and an (ii) _______ evidence of evolution.
  4. According to Darwin evolution took place due to (i) ________ and (ii) ________ of the fittest.
Option: 1

       A– (i) convergent; (D) –(i) small variations, (ii) survival       


Option: 2
  1. – (i) convergent; (B) – (i) oxygen, (ii) nucleosides

Option: 3

B– (i) water vapour, (ii) amino acids; (C) – (i) homologous, (ii) anatomical


Option: 4

 

C- (i) vestigial, (ii) anatomical; (D) – (i) mutations,  (ii)multiplication

 


Answers (1)

best_answer

Vestigial Organs -

The organs which occur in reduced form and are useless to the possessor are called vestigial organs.

- wherein

E.g. tail bone of human beings, appendix in humans.

 

 

 

Posted by

vinayak

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