Multiple Choice QuestionsAssertion : 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
C.
If Assertion is true statement but Reason is false
Koel or cuckoo need not build nests because they transfer their responsibilities to build nests, incubate eggs and nurture hatchlings to other birds specifically crows. Thus, they are called as brood parasites ie, they rely on others to raise their young ones. Being the brood parasite of the crow, the koel's breeding cycle synchronizes with that of crow. Both the koel's and crow's eggs are grey-green with rusty brown markings.
Tailor bird is a garden bird which makes its nest by sewing, it has no direct relation with koel and cuckoo. Also it is a songbird found across tropical Asia.
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
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
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