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31.

The statement entitled, "I eat, you eat, he eats, I am eaten, you are eaten and he is eaten" is indicative of:

A.	Intra-specific struggle for existence in life	B.	Extra-specific struggle for existence in life
C.	Both (a) & (b)	D.	None of these

32.

If a population of organisms is introduced into a new territory where environmental conditions are favourable to it, the population grows rapidly because of:

A.	Increase rated of reproduction	B.	Absence of predators
C.	Unlimited food supply available	D.	More survival of offsprings

33.

The evolution of a species can be considered as the sum total of adoptive changes of species preserved by:

A.	Mass conservation	B.	Laws of motion
C.	Evolution	D.	Natural selection

34.

One of the objectives of experiments in plant breeding is to produce new varieties which have special properties (like high yield, resistance to certain diseases etc.). The method envolves production of mutants in laboratory and then subject them to particular type of solution needed. Which of the following treatments would be more effective:

A.	Irradiation of seeds with visible light	B.	Heating the seeds upto 30?C
C.	Treating the seeds with strong chemicals	D.	Irradiating the seeds with X-rays

35.

Greatest drawback of Darwin's Theory was that it could not offer suitable explanation for:

A.	Survival of fittest	B.	Struggle for increase
C.	Enormous fertility leading to over production	D.	Variations

36.

Increase in the length of neck and fore legs in African giraffe was explained by Lamarck due to the fact that ancient giraffes stretched their neck and fore legs generation after generation and the character acquired as a result of use was inherited. Darwin also explained the phenomenon. Can you point out the way in which Darwin described it:

A.	There was sudden mutation due to use and disuse and it lead to evolution in neck and fore legs	B.	There was effect of temperature on these animals and as a result the change occurred
C.	Only those members which had longer necks and fore legs were selected by nature	D.	There were variations in population

37.

One of the criticism to Darwinism was that it could not give satisfactory explanation for one of the following points:

A.	That there is constant struggle for existence among individuals for food, shelter and other benefits	B.	That there is enormous fertility among organisms leading to their over production
C.	That there is selection of fittest individuals by the nature	D.	Excessive overgrowth of useful structures bringing extinctions rather than evolution

38.

Which of the following points have been put forward by the scientists for criticism of Darwin's theory:

A.	That it lacks satisfactory explanation for causes, origin and inheritance of variations in the organisms	B.	That it offers no explanation for mutations which often bring useful or harmful variations
C.	That the concept covers evolutionary development of solitary structures only but not of sets of coordinated structures	D.	All of these

39.

Cause of struggle for existence among animals is:

A.	That excessive reproduction leads to increase in number	B.	That there is less availability of food to organisms
C.	That there is lack of spaces for living	D.	Due to all of these reasons

40.

Which of the following is associated with name of Darwin:

A.	Philosophic Zoologique	B.	Special Creation
C.	Variation	D.	Galapago's islands