The earliest fossil form in the phylogeny of horse is

1. Merychippus

2. Mesohippus

3. Eohippus

4. Equus

Which is not a vestigial part in humans ? 

1. Segmental muscles of abdomen

2. Finger nails

3. Third molar

4. Coccyx

Which one of the following statements is correct?

1. stem cells are specialised cells

2. There is no evidence of the existence of gills during embryogenesis of mammals

3. All plant and animal cells are totipotent

4. Ontogeny repeats phylogeny

Evolutionary convergence is the development of 

1. common set of characters in the group of different ancestry

2. dissimilar characters in closely related groups

3. common set of characters in closely related groups

4. random mating

The finches of Galapagos islands provide an evidence in favour of

1. special creation

2. evolution due to mutation

3. retrogressive evolution 

4. biogeographical evolution 

Which of the following primate is the closest relative of humans ? 

1. Rhesus monkey

2. Orangutan

3. Gorilla

4. Gibbon

Convergent evolution is illustrated by

1. dogfish and whale

2. rat and dog

3. bacterium and protozoan

4. starfish and cuttle fish

Evolutionary history of an organism is known as

1. ancestry 

2. palaeontology

3. ontogeny 

4. phylogeny

Genetic drift operates in 

1. small isolated population

2. large isolated population

3. fast reproductive population

4. slow reproductive population

Which of the following pair is homologous organ?

1. Wings of birds and locust

2. Wings of birds (sparrow) and pectoral fins of fish

3. Wings of bat and butterfly

4. Legs of frog and cockroach