51.

Assertion: Animals adopt different strategies to survive in hostile environment.

Reason: Praying mantis is green in colour which merges with plant foliage

• If both Assertion and Reason are true and Reason is the correct explanation of Assertion

• If both Assertion and Reason are true but Reason is not the correct explanation of Assertion

• If Assertion is true but Reason is false

• If both Assertion and Reason are false.

Assertion: Among the primates. chimpanzee is the closest relative of the present day humans.

Reason: The banding pattern in the autosome numbers 3 and 6 of man and chimpanzee is remarkably similar.

• If both Assertion and Reason are true and Reason is the correct explanation of Assertion

• If both Assertion and Reason are true but Reason is not the correct explanation of Assertion

• If Assertion is true but Reason is false

• If both Assertion and Reason are false.

Assertion: Dope test is used to estimate the level of blood alcohol by analysing the breath of persons drinking alcohol.

Reason: A drunken person usually feels tense and less talkative

• If both Assertion and Reason are true and Reason is the correct explanation of Assertion

• If both Assertion and Reason are true but Reason is not the correct explanation of Assertion

• If Assertion is true but Reason is false

• If both Assertion and Reason are false.

Assertion: The honey bee queen copulates only once in her life time.

Reason: The honey bee queen can lay fertilized as well as unfertilized eggs.

• If both Assertion and Reason are true and Reason is the correct explanation of Assertion

• If both Assertion and Reason are true but Reason is not the correct explanation of Assertion

• If Assertion is true but Reason is false

• If both Assertion and Reason are false.

Assertion: From evolutionary point of view, human gestation period is believed to be shortening.

Reason: One major evolutionary trend in humans has been the larger head undergoing relatively faster growth rate in the foetal stage.

• If both Assertion and Reason are true and Reason is the correct explanation of Assertion

• If both Assertion and Reason are true but Reason is not the correct explanation of Assertion

• If Assertion is true but Reason is false

• If both Assertion and Reason are false.

Assertion: Natural selection is the outcome of differences in survival and reproduction among individuals that show variation in one or more traits.

Reason: Adaptive forms of a given trait tend to become more common; less adaptive ones become less common or disappear.

• If both Assertion and Reason are true and Reason is the correct explanation of Assertion

• If both Assertion and Reason are true but Reason is not the correct explanation of Assertion

• If Assertion is true but Reason is false

• If both Assertion and Reason are false.

Assertion: Red algae contribute in producing coral reefs.

Reason: Some red algae secrete and deposit calcium carbonate over their walls.

• If both Assertion and Reason are true and Reason is the correct explanation of Assertion

• If both Assertion and Reason are true but Reason is not the correct explanation of Assertion

• If Assertion is true but Reason is false

• If both Assertion and Reason are false.

Assertion: Insects visit flowers to gather honey.

Reason: Attraction of flowers prevents the insects from damaging other parts of the plant.

• If both Assertion and Reason are true and Reason is the correct explanation of Assertion

• If both Assertion and Reason are true but Reason is not the correct explanation of Assertion

• If Assertion is true but Reason is false

• If both Assertion and Reason are false.

Assertion: Coconut tree is distributed in coastal areas over a large part of the world.

Reason: Coconut fruit can float and gel dispersed over thousands of kilometers before losing viability.

• If both Assertion and Reason are true and Reason is the correct explanation of Assertion

• If both Assertion and Reason are true but Reason is not the correct explanation of Assertion

• If Assertion is true but Reason is false

• If both Assertion and Reason are false.

Assertion: Cattle breeds can be improved by superovulation and embryo transplantation.

Reason: Superovulation in high milk-yielding cows is induced by hormonal injection.

• If both Assertion and Reason are true and Reason is the correct explanation of Assertion

• If both Assertion and Reason are true but Reason is not the correct explanation of Assertion

• If Assertion is true but Reason is false

• If both Assertion and Reason are false.