Which of the following options is not correct regarding the early atmosphere?

(A) Oxygen was totally absent

(B) Atmosphere was reducing

(C) Temperature was high

(D) Presence of free $H_2$ molecules

(E) Presence of molecules like $C{H}_4,$ $N{H}_3,$ $H_{2}O$ vapours

1. A, D and E

2.  A and D

3. D and E

4. A only

If frequency of 'A' allele is 0.4 than, find out the frequency of 'B' allele and heterozygous genotype in a random mating population at equilibria.

1. 0.6 an 0.24

2. 0.6 and 0.96

3. 0.6 and 0.48

4. 0.6 and 0.50

The correct statement about the nature of evolution and natural selection is

1. Evolution is a process while natural selection is the end result of a process which is unknown.

2. Natural selection is a process while evolution is the end result of a process which is unknown.

3. Both evolution and natural selection are the end results of a process which is unknown.

4. It is still unclear whether evolution and natural selection are process or end results of unknown processes.

The excess use of herbicides and pesticides etc. has resulted in selection of resistant varieties in a much lesser time. Hence, resistant organisms/cells are appearing in a time span of months or years and not centuries. This statement is:

(1) In favour of evolution by anthropogenic action

(2) Against the natural selection theory

(3) In favour of sexual selection theory

(4) In favour of genetic drift

Industrial melanism cannot be explained by

A. Natural selection theory

B. Mechanism of directional selection

C. Mechanism of genetic drift

D. Mechanism of founder's effect

E. Mechanism of progressive selection

1. A, C, D and E

2. A and D only

3. C and D only

4. D and E only

In a population, homozygous & heterozygous individuals are in a certain proportion. This proportion can't be changed by

1. Natural Selection

2. Mutation

3. Recombination

4. Use and Disuse of organs

Biologists discover about 1000 species in an Island
which is descended from a single ancestor species.
What is the reason behind the such large speciation?
1. Mutation
2. Adaptive radiation
3. Convergent evolution.
4. Reproductive isolation

The sugar glider and flying squirrel belong to two different groups of mammals, but they have both evolved bushy tails and flaps of skin that help them exploit their forest environments more efficiently. This pattern of evolution is an example of :

1. Character displacement

2. Adaptive radiation

3. Convergent evolution

4. Divergent evolution

Natural selection is the survival of fittest, which of the
following most precisely describe the survival of fittest?
1. The physical strength of organism.
2. How many fertile offspring is produced by an
organism.
3. Capability to tolerate environmental extremities.
4. How long they survive.

Which of the following will not show convergent evolution?
1. Eye of Octopus and mammal
2. Flippers of Penguins and Dolphins
3. Sweet potato and potato
4. Hearts of frog and rabbit