What decides the frequency of an allele in a
population?
1. Dominance
2. Its location on a particular chromosome
3. Its degree of expression
4. Natural selection

According to Darwin, the organic evolution is due to

(1) Interspecific competition

(2) Competition within closely related species

(3) Reduced feeding efficiency in one species due to the presence of interfering species

(4) Intraspecific competition

According to Darwin, the organic evolution is due to

(1) Interspecific competition

(2) Competition within closely related species

(3) Reduced feeding efficiency in one species due to the presence of interfering species

(4) Intraspecific competition

A person with sickle cell anemia is:

What decides the frequency of an allele in a population?

Which of the following pairs of organs do not represent analogous organs?
1. Eye of an octopus and eye of a mammal
2. Flippers of penguin and flippers of dolphin
3. Wings of bat and forelimbs of humans
4. Wings of birds and wings of butterfly

Both Charles Darwin and A.R.Wallace were influenced by the:
1. writings of J.B.S.Haldane on the origin of life
2. findings of Urey and Miller experiments
3. findings on the Galapagos Islands
4. essay on human population by T.R.Malthus

For the stability of the organic compounds, Oparin opined that probably:
1. UV radiation never reached the surface of the primeval Earth

2. the primitive Earth was in a molten state

3. the primitive Earth atmosphere was reducing rather than oxidizing

4. plenty of energy sources were available for chemical reactions to occur

In Australia, marsupials and placental mammals have evolved to share many similar characteristics. This type of evolution may be referred to as:

A population of a species invades a new area. Which of the following condition will lead to adaptive radiation?