Multiple Choice QuestionsThe treatment of snake-bite by antivenom is an example of
artificially acquired active immunity
artificially acquired passive immunity
naturally acquired passive immunity
specific natural immunity.
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.
B.
have edible parts which are analogous organs
Analogous organs are the opposite of homologous organs, which have similar functions but different origins. An example of an analogous trait would be the wings of insects, bats and birds that evolved independently in each lineage separately after diverging from an ancestor without wings.
Potato and sweet potato arc absolutely different in their origin as potato is modified underground stem (tuber), while sweet potato is tuberous root. It means both have edible parts, which are different organs.
Somaclonal variation can be obtained by
application of colchicine
irradiation with gamma rays
tissue culture
hybridisation.
How many different types of gametes can be formed by F1 progeny, resulting from the following cross
AA BB CC x aa bb cc
3
8
27
64
Assertion: Agricultural output increased several times after introduction of DDT.
Reason: DDT was the first insecticide used on a wide scale.
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: 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: Tapeworm, roundworm and pinworm are endoparasites of human intestine.,
Reason: Improperly cooked food is the source of all intestinal infections.
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: Fish meal is a rich source of protein for cattle and poultry.
Reason: Fish meal is produced from non-edible parts of fishes like fins, tail etc.
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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