Respuesta :

Answer:

15. Cedrus

16.Both 2&3

17.Diploid

18.Both 2 &3

#15

One type of tallest tree is pinus.

#16

In Gymnosperms pollination generally occurs by Both (2) and (3)

#17

The ploidy of a gemate present in the pollen grain is polypoid.

#18

In gymnosperms ,the pollen tube discharge the male gemates in the ovary