STD 11 - 19. Chemical coordination and integration — NEET STD 11 Science — Question

Evolution of man took place in

Mammals are said to have a "double circulatory system''. This means

Select the correct option.

Which one of the following options gives one correct example each of convergent evolution and divergent evolution?

Convergent evolution		Divergent evolution
(A) Eye of octopus and mammals		Bones of forelimbs of vertebrates
(B) Thorns of Bougainvillea and tendrils of Cucurbita		Wings of butterflies and bird
(C) Bones of forelimbs of vertebrates		Wings of butterfly and birds
(D) Thorns of Bougainvillea and tendrils of Cucurbita		Eyes of octopus and mammals

Plants of this group are diploid and well adapted to extreme conditions. They grow bearing sporophytes in compact structures called cones. The group in reference is

Sponges capture food particles with the help up

Assertion : In case of incomplete linkage, linked gene show new combination along with parental combination.

Reason : In case of incomplete linkage, linked genes are separated by crossing over.

Haemophilia is

A person passes much urine and drinks much water but his blood glucose level is normal. This condition may be the result of