$A$ : Cattle or goat never graze on Calotropis.
$R$ : Thorns are present as a morphological means of defence
Assertion and Reason both are correct and also correct explanation.
Assertion and Reason both are correct but not explanation of assertion.
Assertion is correct, but Reason is incorrect.
Both Assertion and Reason are incorrect.
Predators play important role in
Within biological communities, some species are important in determining the ability of a large number of other species to persist in the community. Such species are called
What is brood parasitism ? Explain with the help of an example.
Association between suckerfish $ (Remora) $ and shark is