The bones of forelimbs of whale, bat, cheetah and man are similar in structure, because

1. one organism has given rise to another 

2. they share a common ancestor 

3. they perform the same function

4. they have biochemical similarities

Analogous organs arise due to 

1. divergent evolution

2. artificial selection 

3. genetic drift 

4. convergent evolution 

(p + q)²  = p² +  2pq + q²  = 1 represents an equation used in 

Appearance of antibiotic-resistant bacteria is an example of 

1. adaptive radiation

2. transduction 

3. pre-existing variation in the population

4. divergent evolution 

Evolution of life shows that life forms had a trend of moving from:

1. land to water

2. dryland to wetland

3.  freshwater to sea water

4. water to land

Viviparity is considered to be more evolved because 
 

Fossils are generally found in 

1. sedimentary rocks 

2. igneous rocks

3. metamorphic rocks 

4. any type of rock  

For the MN-blood group system, the frequencies of M and N alleles ar 0.7 and 0.3 respectively. The expected frequency of MN-blood group bearing organisms is likely to be 

1. 42%

2. 49%

3. 9%

4. 58%

Industrial melanism observed in moth, Biston betularia, is which type of selection?

1. Stabilising 

2. Directional 

3. Disruptive

4. Artificial

The most accepted line of descent in human evolution is