Assertion : Bats and whales are classified as mammals.

Reason : Bats and whales have four-chambered heart.

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

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

• If Assertion is true statement but Reason is false

• If both Assertion and Reason are false statements

Assertion : Organochlorine pesticides are organic compounds that have been chlorinated.

Reason : Fenitrothion is one of the organochlorine pesticides. 

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

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

• If Assertion is true statement but Reason is false

• If both Assertion and Reason are false statements

Assertion : Holoblastic cleavage with almost equal-sized blastomeres is a characteristic of placental animals.

Reason : Eggs of most mammals, including humans, are of centrolecithal type.

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

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

• If Assertion is true statement but Reason is false

• If both Assertion and Reason are false statements

Assertion : All birds, except the ones like koel (cuckoo) build nests for retiring and taking rest during night time (day time for nocutrnal).

Reason : Koel lays its eggs in the nests of tailor bird.

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

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

• If Assertion is true statement but Reason is false

• If both Assertion and Reason are false statements

Assertion : Old age is not an illness. It is a continuation of life with decreasing capacity for adaptation.

Reason : Cessation of mitosis is a normal genetically programmed event.

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

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

• If Assertion is true statement but Reason is false

• If both Assertion and Reason are false statements

306.

Prototherians are the connecting links between:

• amphibians and aves

• reptiles and mammals

• fishes and amphibians

• reptiles and amphibinas

The pioneers in the field of 'organic evolution' are:

• Karl Landsteiner, Hugo de Vries, Malthus

• Darwin, Hugo de Vries, Lamarck, Huxley

• Lamarck, Karl Landsteiner, Malthus, Hugo de Vries

• Darwin, Lamarck, Karl Landsteiner, Hugo de Vries

Darwin finches are related to which of the following evidences ?

• Fossils

• Embryology

• Anatomy

• Geographical distribution

Allopatric speciation is due to :

• geographical separation of population

• hybridization between closely related species

• migration of the members of a species from one to other population

• both (b) and (c)

Evolutionary convergence is characterized by:

• development of characteristics by random mating

• replacement of common characteristic in different related groups

• development of dissimilar characteristics in closely related groups

• development of a common set of characteristics in groups of different ancestry