Which of the following is the smallest gymnosperm?

The ovule of $Cycas$ is:

The phloem of gymnosperms and angiosperms differs due to the presence or absence of . . . . . . .

$A$ typical gymnospermous plant has $8$ chromosomes in its leaf cells. What will be the number of chromosomes in the cells of its gametophyte?

Nitrogen fixation occurs in coralloid roots of $Cycas$ with the help of:

Fruitless flowering plants are called