Multiple Choice QuestionsIf the Bengal Tiger becomes extinct
hyenas and wolves will become scars
the wild areas will be safe for man and domestic animals
its gene pool will be lost forever
the populations of beautiful animals like deers will get stabilized.
DNA is present in
chromosomes and dictyosomes
chloroplasts and lysosomes
mitochondria and chloroplasts
mitochondria and endoplasmic reticulum.
Potato and sweet potato
have edible parts which are homologous organs
have edible parts which are analogous organs
have been introduced in India from the same place
are two species of the same genus.
Assertion : Human ancestors never used their tails and so the tail expressing gene has disappeared in them.
Reason : Lamarck's theory of evolution is popularly called theory continuity of germ plasm.
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 but Reason is false
If both Assertion and Reason are false
Assertion : Comparative biochemistry provides a strong evidence in favour of common ancestry of living beings.
Reason : Genetic code is universal
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 but Reason is false
If both Assertion and Reason are false
Assertion : Darwin's finches show a variety of beaks suited for eating large seeds, flying insects and cactus seeds.
Reason : Ancestral seed-eating stock of Darwin's finches radiated out from South American mainland to different geographical areas of the Galapagos Islands, where they found competitorfree new habitats.
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 but Reason is false
If both Assertion and Reason are false.
A.
If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion
Darwin finches are an excellent example of the way in which the species gene pools have adapted in order for long term survival via their offspring. They were formed due to divergent evolution to avoid intcrspecific competition.
The common birds of Galapagos islands, were different from the finches of main land. The closely related species of finches had beak of different shapes and sizes, and adapted for feeding on completely different diets. Darwin also found that fossils of Galapagos islands are most similar to living species of South America. The food supply increases in arithmetic ratio but the population increases in geometric ratio. With the study of this theory it struck to Darwin that there is struggle for existence among plants and animals. This concept or competition among the living beings for their survival offered the basis for the theory of natural selection. Apparently a single ancestral group can give rise to several different varieties of species.
The early stage human embryo distinctly possesses
gills
gill slits
external ear (pinna)
eye brows
Assertion: Coaccrvates are believed to be the precursors of life.
Reason: Coaccrvates were self-duplicating aggregates of proteins surrounded by lipid molecules
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: 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.
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