Which of these are examples of evolution by anthropogenic action?

(i) Adaptive radiation of marsupials of Australia.

(ii) Appearance of antibiotic resistant microbes.

(iii) Evolution in finches Galapagos island.

(iv) Appearance of dark winged moth in England during post industrialization period.

(v) Convergent evolution of placental mammals in Australia.

  • (i) and (iii) only

  • (v) only

  • (ii) only

  • (ii) and (iv) only

  • (ii) and (iv) only


D.

(ii) and (iv) only

Appearance of antibiotic resistant microbes and convergent evolution of placental mammals in Australia are example of evolution by anthropogenic action.


Evolution of different species in a given geographical area, starting from a point and spreading to other geographical areas is known as

  • Geographic isolation

  • Migration

  • Parallel evolution

  • Natural selection

  • Natural selection


E.

Adaptive radiation

Adaptive radiation shows evolution of an animal or plant group into a wide variety of types adapted to specialized mode of life.


In a population, a gene has two alleles 'A' and 'a'. The frequency of allele 'A' is 0.4. What will be the frequency of allele 'a'?

  • 0.4

  • 0.6

  • 0.48

  • 0.16

  • 0.16


B.

0.6

For any alleles A + a = 1

0.4 + a = 1

a = 1 - 0.4 = 0.6


Match the hominids with their correct brain size :

A. Homo habilis i. 900 cc
B. Homo neanderthalensis ii. 1350 cc
C. Homo erectus iii. 650 - 800 cc
D. Homo sapiens iv. 1400 cc

Select the correct option

  • A - iii; B - ii; C - i; D - iv

  • A - iii; B - iv; C - i; D - ii

  • A - iv; B - iii; C - i; D - ii

  • A - iii; B - i; C - iv; D - ii


B.

A - iii; B - iv; C - i; D - ii

Among the given options, option b is the correct one.

A. Homo habilis - 650 - 800 cc

B. Homo neanderthalensis - 1400 cc

C. Homo erectus - 900 cc

D. Homo sapiens - 1350 cc


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Identify 'a' and 'b' in the figure given below representing proportionate number of major vertebrate taxa.



In the given figure, 

a represents amphibians, and 

 b represents mammals

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