Directional selection favours:

(1) Both extremes of a trait

(2) Intermediate form of a trait

(3) Environmental differences

(4) One extreme form over the other extreme form and over intermediate forms of the trait

In Hardy- Weinberg equation, the frequency of heterozygous individual is represented by

(1) P²

(2) 2pq

(3) pq

(4) q²

A location with luxuriant growth of lichens on the trees indicates that the:-

1. trees are very healthy

2. trees are heavily infested

3. location is highly polluted

4. location is not polluted

Among the human ancestors the brain size was more than 1000 cc in:

1. Homo neanderthalensis

2. Homo erectus

3. Ramapithecus

4. Homo habilis

The early-stage human embryo distinctly possesses

1. gills                             

2. gill slits

3. external ear (pinna)       

4. eyebrows                             

In Miller's experiment, he used a mixture of CH₄, NH₃, H₂ and water vapour in a closed flask to mimic early earth conditions. What was the temperature at which this flask was kept?

(a) $800°\mathrm{C}$

(b) $1200°\mathrm{C}$

(c) $200°\mathrm{C}$

(d) $400°\mathrm{C}$

The correct sequence of stages in the evolution of modern man (Homo sapiens), is

(1) Homo erectus, Australopithecus, neanderthal man, cro-magnon man, modern man

(2) Australopithecus, Homo erectus, neanderthal man, cro-magnon man, modern man

(3) neanderthal man, Australopithecus, cro-magnon man, Homo erectus, modern man

(4) Australopithecus, neanderthal man, cro-magnon, Homo erectus, modern man

Theory of 'Saltations' was given by 

(1) G Mendel

(2) Hugo de Vries

(3) J B S Haldane

(4) H J Miller

Darwin believed that certain parts of the body get larger and more complex through the generations because they :

1. are used more extensively than other parts 

2. contribute to greater reproductive success

3. are pre-determined to do so 

4. are most similar to God's perfection 

Most fossils are found in:

1. Granite

2. Sedimentary rocks

3. Lava flows

4. Black soil