In gymnosperms,the primary components of xylem that conduct water are:

The endosperm of a gymnosperm is:

In $Pinus$,male gametes are produced in the pollen tube by the division of which of the following cells?

Assertion: $Ginkgo biloba$ is a living fossil.
Reason: Organisms which have persisted and remained unchanged for the past several million years while their relatives disappeared.

Where are the megasporophylls located?

All gymnosperms are ..........