Artificial selection to obtain cows yielding high milk output represents

1.	Stabilising selection as it stabilizes this character in the population
2.	Directional as it pushes the mean of the character in one direction
3.	Disruptive as it spills the population into two, one yielding higher output and the other lower output
4.	Stabilizing followed by disruptive as it stabilizes the population of producing higher yielding cows

In Hardy- Weinberg equation, the frequency of heterozygous individual is represented by

(1) P²

(2) 2pq

(3) pq

(4) q²

Which of the following is the correct sequence of events in the origin of life?

I.    Formation of protobionts,

II.   Synthesis of organic monomers.

III.  Synthesis of organic polymers.

IV.   Formation of DNA-based genetic systems.

(1) I,II,III,IV

(2) I,III,II,IV

(3) II,III,I,IV

(4) II,III,IV,I 

Analogous structures are a result of
(1) Convergent evolution 

(2) shared ancestry

(3) stabilising selection 

(4) divergent evolution

Which of the following structures is homologous to the wing of a bird?

(1) Wing of a moth

(2) Hind limb of rabbit

(3) Flipper of whale

(4) Dorsal fin of a shark

Following are the two statements regarding the origin of life

I.  The earliest organisms that appeared on the earth were non-green presumably

anaerobes.

II. The first autotrophic organisms were the chemoautotrophs that never released

oxygen.

Of the above statements which one of the following options is correct?

1. II is correct but I is false

2. Both I and II are correct

3. Both I and II are false

4. I is correct but II is false 

The wings of a bird and the wings of an insect are

1. homologous structures and represent divergent evolution

2. analogous structures and represent convergent evolution

3. phylogenetic structures and represent divergent evolution

4. homologous structures and represent convergent evolution

Which of the following are most suitable indicators of SO₂ pollution in the environment?

1. Lichens

2. Conifers

3. Algae

4. Fungi

Which of the following had the smallest brain capacity?

1. Homo erectus

2. Homo sapiens

3. Homo neanderthalensis

4. Homo habilis

A population will not exist in Hardy-Weinberg equilibrium if

1. individuals mate selectively

2. there are no mutations

3. there is no migration

4. the population is large