Resin and turpentine are obtained from $..........$.

The largest ovule in the plant kingdom is found in $......$.

Male and female cones both are present in the same plant in $:-$

In which of the following is the gametophyte not an independent,free-living generation?

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 $Pinus$,only the lower part of the oospore is concerned with the development of the embryo. Such development is known as: