From evolutionary point of view , the tendrils of Pea plant and Grape Vine are

Echinoderms are heartless , brainless , headless , yet from evolutionary point of view , they have been placed on the top of the invertebrate phyla because of

From evolutionary point of view, retention of the female gametophyte with developing young embryo on the parent sporophyte for some time, is first observed in :

From evolutionary point of view, retention of the female gametophyte with developing young embryo on the parent sporophyte for some time, is first observed in :

From evolutionary point of view, retention of the female gametophyte with developing young embryo on the parent sporophyte for some time, is first observed in :

From evolutionary point of view, tracheids and sieve cells are more primitive than tracheae and sieve tubes respectively. The angiosperms have

From evolutionary point of view, retention of the female gametophyte with developing young embryo on the parent sporophyte for some time, is first observed in :

From evolutionary point of view allogamy is better than autogamy. Why?