In which of the following groups of organisms is the sympatric speciation most likely to occur?
1. amphibians
2. arthropods
3. plants
4. birds

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

The first mammals arose in the _____ period:
1. Carboniferous
2. Jurassic
3. Cretaceous
4. Triassic

Which theory, regarding the origin of life, is alternatively also called “panspermia”?

Population that experience genetic drift most commonly are:
1. isolated
2. small in number
3. mobile
4. closely adapted to their environment

The genetic drift is also called as :
1. Sewall-wright effect
2. Hardy-Weinberg equilibrium
3. Balanced polymorphism
4. Gene flow

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

U²³⁸, the radioactive isotope of uranium, is very useful in absolute dating of rocks. It’s half life is about:
1. 4500 years
2. 4.5 million years
3. 45 million years
4. 4.6 billion years

What causes the ‘struggle for existence?

Lamarck has been criticized mainly on his tenet of:
1. inheritance of acquired characters
2. use and disuse of organs
3. key role played by environment in evolution
4. vital force in the body