Given below are the three statements each with one or two blanks. Select the option which correctly fills up the blanks in any two statements. ( a ) For a long time it was also believed that life came out of decaying and rotting matter like straw, mud, etc. This was the theory of i _ . ( b ) During post-industrialisation period, the tree trunks became dark due to industrial smoke and soots. Under this condition the i _ did not survive due to predators, while i i _ survived. ( c ) Lamarck said that evolution of life forms had occurred but driven by i _ of organs.

(b) - i white-winged moth, i i dark-winged moth, ( c ) - i use and disuse

( a ) - i panspermia, ( c ) - i natural selection

( a ) - i spontaneous generation, ( b ) - i dark-winged moth, i i white-winged moth

( a ) - i eternity of life, ( c ) - i use and disuse

From the given four statements ( a - d ) each with one or two blanks choose the option which correctly fills up the blanks in two statements. ( a ) Wings of butterfly and birds look alike and are the results of i _ evolution. ( b ) Miller showed that C H 4 , H 2 , N H 3 and i _ when exposed to electric discharge in a flask resulted in formation of i i _ . ( c ) Vermiform appendix is a i _ organ and an i i _ evidence of evolution. ( d ) According to Darwin, evolution took place due to i _ and i i _ of the fittest.

( a ) - i convergent; ( d ) - i small variations, ( i i ) survival

( a ) - i convergent; ( b ) - i oxygen, i i nucleosides

( b ) - i water vapour, i i amino acids; ( c ) - i homologous, i i anatomical

( c ) - i vestigial, i i anatomical; ( d ) - i mutations, i i multiplication

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Consider the following three statements and select the correct option stating which one is true $(T)$ and which one is false $(F)$ .
(i) Oparin of Russia and Haldane of England proposed that the first form of life could have come from pre-existing non-living organic molecules (e.g., RNA, protein, etc.) and that formation of life was preceded by chemical evolution.
(ii) Based on observations made during a sea voyage around the world, Charles Darwin concluded that existing living forms share similarities to varying degrees only among themselves.
(iii) Evolution by natural selection must have started when cellular forms of life with different metabolic capability originated on Earth.

(i) (ii) (iii)

(a) F T T

(b) T F T

(c) T T F

(d) F F T

	(i)	(ii)	(iii)
(a)	F	T	T
(b)	T	F	T
(c)	T	T	F
(d)	F	F	T

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Important Questions on Evolution

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MTG OBJECTIVE NCERT AT YOUR FINGERTIPS BIOLOGY CLASS XI + XII>Chapter 30 - Evolution>MCQS CORNER>Q 51

Read the following statements carefully and select the correct ones.
(i) Alfred Wallace, a naturalist who worked in Malay Archipelago had also come to similar conclusions as Darwin around the same time.
(ii) August Weismann by careful experimentation demonstrated that life comes only from pre-existing life.
(iii) The organs which have the same fundamental structure but are different in functions are called homologous organs.
(iv) Rate of appearance of new form is inversely proportional to life span of organism.

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MTG OBJECTIVE NCERT AT YOUR FINGERTIPS BIOLOGY CLASS XI + XII>Chapter 30 - Evolution>MCQS CORNER>Q 52

By the statement ‘survival of the fittest’, Darwin meant that

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MTG OBJECTIVE NCERT AT YOUR FINGERTIPS BIOLOGY CLASS XI + XII>Chapter 30 - Evolution>MCQS CORNER>Q 53

Which of the following are the two key concepts of Darwinian theory of evolution?

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MTG OBJECTIVE NCERT AT YOUR FINGERTIPS BIOLOGY CLASS XI + XII>Chapter 30 - Evolution>MCQS CORNER>Q 54

Given below are the three statements each with one or two blanks. Select the option which correctly fills up the blanks in any two statements.

(a)

For a long time it was also believed that life came out of decaying and rotting matter like straw, mud, etc. This was the theory of

\underline{(i)}

(b)

During post-industrialisation period, the tree trunks became dark due to industrial smoke and soots. Under this condition the

\underline{(i)}

did not survive due to predators, while

\underline{(i i)}

survived.

(c)

Lamarck said that evolution of life forms had occurred but driven by

\underline{(i)}

of organs.

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MTG OBJECTIVE NCERT AT YOUR FINGERTIPS BIOLOGY CLASS XI + XII>Chapter 30 - Evolution>MCQS CORNER>Q 55

According to Lamarckism, long necked giraffes evolved because

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MTG OBJECTIVE NCERT AT YOUR FINGERTIPS BIOLOGY CLASS XI + XII>Chapter 30 - Evolution>MCQS CORNER>Q 56

Which of the following evidences does not favour the Lamarckian concept of inheritance of acquired characters?

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MTG OBJECTIVE NCERT AT YOUR FINGERTIPS BIOLOGY CLASS XI + XII>Chapter 30 - Evolution>MCQS CORNER>Q 57

"Human population grows in geometric ratio while food materials increase in arithmetic proportion." It is a statement from

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MTG OBJECTIVE NCERT AT YOUR FINGERTIPS BIOLOGY CLASS XI + XII>Chapter 30 - Evolution>MCQS CORNER>Q 58

From the given four statements

(a - d)

each with one or two blanks choose the option which correctly fills up the blanks in two statements.

(a)

Wings of butterfly and birds look alike and are the results of

\underline{(i)}

evolution.

(b)

Miller showed that

{C H}_{4}, H_{2}, {N H}_{3}

and

\underline{(i)}

when exposed to electric discharge in a flask resulted in formation of

\underline{(i i)}

(c)

Vermiform appendix is a

\underline{(i)}

organ and an

\underline{(i i)}

evidence of evolution.

(d)

According to Darwin, evolution took place due to

\underline{(i)}

and

\underline{(i i)}

of the fittest.

Important Questions on Evolution

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