Genetic drift operates only in

• island population

• smaller population

• larger population

• none of these

Choose the wrong statement

• Louis Pasteur demonstrated that life comes only from pre-existing life

• S.L. Miller observed that electric discharge in a flask containing CH₄, H₂, NH₃ and water vapour at 800°C formed amino acids

• Flippers of penguins and dolphins are examples for homology

• Homology indicates common ancestry

• Homology indicates common ancestry

The hominid fossils discovered in Java in 1891 revealed a stage in the human evolution, which was called

• Homo erectus

• Dryopithecus

• Australopithecus

• Homo habilis

• Homo habilis

The first human-like hominid was called

• Homo habilis

• Homo erectus

• Homo sapiens

• Dryopithecus

• Dryopithecus

Oparin and Haldane proposed

• the theory of natural selection

• that migration affects genetic equilibrium

• that mutations caused speciation

• that the first form of life could have come from preexisting non-living organic molecules

• that the first form of life could have come from preexisting non-living organic molecules

Choose the wrong pair

• Divergent evolution – Forelimbs of whales, bats, cheetah and human

• Convergent evolution – Flippers of penguins and dolphins

• Homologous structures – Vertebrate hearts

• Analogous structures – Tendrils of Bougainvillea and Cucurbita

• Analogous structures – Tendrils of Bougainvillea and Cucurbita

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

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

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

370.

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