After about how many years of the formation of the earth, life appeared on this planet?

1. 500 billion years

2. 50 million years

3. 500 million years

4. 50 billion years

The phenomenon of the evolution of different species in a given geographical area starting from a point and spreading to other habitats is called:

A Hominid fossil discovered in Java in 1891, now extinct, having a cranial capacity of about 900 cc was:

Embryological support for evolution was proposed by:

Change in the frequency of an allele in a population due to random sampling of organisms brought about by a chance event is called:
1. Gene flow
2. Genetic drift
3. Natural selection
4. Saltation

The factor that leads to Founder effect in a population is:
1. Mutation
2. Genetic drift
3. Natural selection
4. Genetic recombination

Match List-I with List-II:

Choose the correct answer from the options given below:

Flippers of Penguins and Dolphins are examples of:

From his experiments, S.L. Miller produced amino acids by mixing which of the following in a closed flask:

1. ${\mathrm{CH}}_3,$ ${\mathrm{H}}_2,$ ${\mathrm{NH}}_4$ $\mathrm{and}$ $\mathrm{water}$ $\mathrm{vapour}$ $\mathrm{at}$ $800°\mathrm{C}$

2. ${\mathrm{CH}}_4,$ ${\mathrm{H}}_2,$ ${\mathrm{NH}}_3$ $\mathrm{and}$ $\mathrm{water}$ $\mathrm{vapour}$ $\mathrm{at}$ $600°\mathrm{C}$

3. ${\mathrm{CH}}_3,$ ${\mathrm{H}}_2,$ ${\mathrm{NH}}_3$ $\mathrm{and}$ $\mathrm{water}$ $\mathrm{vapour}$ $\mathrm{at}$ $600°\mathrm{C}$

4. ${\mathrm{CH}}_4,$ ${\mathrm{H}}_2,$ ${\mathrm{NH}}_3$ $\mathrm{and}$ $\mathrm{water}$ $\mathrm{vapour}$ $\mathrm{at}$ $800°\mathrm{C}$

Which of the following refers to correct example(s) of organisms that have evolved due to changes in environment brought about by anthropogenic action?

1. (a) and (c)

2. (b), (c) and (d)

3. only (d) 

4. only (a)