You are currently viewing Class 12 Biology MCQs Chapter – 7
Class 12 Biology MCQs Chapter - 7

Class 12 Biology MCQs Chapter – 7

1. Major radiation of mammals, birds and pollinating insects took place in which epoch?

( A ) Oegocene

( B ) Eocene

( C ) Pliocene

( D ) Palaeocene

Answer-( D )

 

2. Golden age of reptiles was:

( A ) Proterozoic era

( B ) Palaeozoic era

( C ) Mesozoic era

( D ) Coenozoic era

Answer-( C )

 

3. Amphibians were dominant during

( A ) Carboniferous

( B ) Silurian

( C ) Ordovician

( D ) Cambrian

Answer-( A )

 

4. Coacervates were experimentally produced by :

( A ) Oparin and Sydney Fox

( B ) Fischer and Huxley

( C ) Jacob and Monod

( D ) Urey and Miller

Answer-( A )

 

5. Chance elimination of alleles from small population is :

( A ) Adaptation

( B ) Genetic drift

( C ) Speciation

( D ) Selection pressure

Answer-( B )

 

6. Which are immortal ?

( A ) Germ cells

( B ) Liver cells

( C ) Kidney cells

( D ) Neurons

Answer-( A )

 

7. Discontinuous variations are due to :

( A ) Crossing over

( B ) Mutations

( C ) Segregation of chromosomes

( D ) Independent assortment

Answer-( B )

 

8. Theory of chemical origin of life was proposed by :

( A ) Miller and Fox

( B ) Oparin and Haldane

( C ) Miller and Watson

( D )Watson and Melvin

Answer-( B )

 

9. Evolutionary history of an organism is known as:

( A ) Ontogeny

( B ) Phylogeny

( C ) Ancestry

( D ) Palaenotology

Answer-( B )

 

10. Which one provides most evident proof of evolution ?

( A ) Fossils

( B ) Vestigial organs

( C ) Embryo

( D ) Morphology

Answer-( A )

 

11. Dinosaurs were present during :

( A ) Palaeozoic

( B ) Precambrian

( C ) Coenozoic

( D) Mesozoic

Answer-( D )

 

12.Extra terrestrial origin of life was proposed by

( A ) Catastrophism

( B ) Special creation

( C ) Panspermia

( D ) Sportaneous generation

Answer-( C )

 

13. Stanley Miller’s expreriment

Supports

( A ) Chemical theory

( B ) Abiogenesis

( C ) Biogenesis

( D ) Pangenesis

Answer-( A )

 

14. Operon model was proposed was

( A ) Watson & Crick

( B ) Nierenberg

( C ) Jacob & Monad

( D ) None of these

Answer-( C )

 

15. Echidna is

( A ) Connecting link

( B ) Vestigeal organ

( C ) Extinct link

( D ) None of these

Answer-( A )

 

16. S.L. Miller is related to

( A ) Origin & Evolution of life

( B ) Use and disuse theory of evolution

( C ) Neo-Darwinism

( D ) Neo-Lamarckism

Answer-( A )

 

17. Dryopithecus is more similar to

( A ) Ape

( B ) Gorilla

( C ) Chimpanzee

( D ) Man

Answer-( A )

 

18. Organic evolution was preceded by chemical evolution, the champions of this theory are

( A )A. I. Oparin and J.B.S. Haldane

( B ) Charles Darwin

( C ) Arrhenius

( D )Baptiste Lamarck

Answer-( A )

 

19. Adaptive radiation in Australian marsupials are example of :

( A ) Divergent Evolution

( B  ) Convergent Evolution

( C ) Saltation

( D ) None

Answer-( A )

 

20. Appearance of antibiotic resistance bacteria is an example of

( A ) Adaptive radiation

( B ) Transduction

( C ) Pre-existing variation

( D ) Divergent Evolution

Answer-( A )

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