The winged pollen grains of $Pinus$ $sp.$ are produced in:

The lateral conduction in gymnospermic leaf is by

The female cone of $Pinus$ can be compared to which part of an angiosperm plant?

Which of the following is a living fossil?

Given below are two statements: One labelled as Assertion $A$ and the other labelled as Reason $R$:
Assertion $A$: In gymnosperms,the pollen grains are released from the microsporangium and carried by air currents.
Reason $R$: Air currents carry the pollen grains to the mouth of the archegonia where the male gametes are discharged and pollen tube is not formed.
In the light of the above statements,choose the correct answer from the options given below:

In a gymnosperm,if the haploid chromosome number is $12$,what will be the number of chromosomes in its root and endosperm,respectively?