Gymnosperms Flashcards
1
Q
Seed
A
mature ovule containing an embryo
2
Q
Ovule
A
an integument megasporangium
3
Q
Integument
A
outermost layer enveloping the nucellus (develops seed coat)
4
Q
nucellus
A
equivalent to megasporangium
5
Q
Micropyle
A
opening in the integuments through which the pollen tube enters
6
Q
pollen grain
A
a microspore containing a mature or immature microgametophyte
7
Q
prothallial cell
A
remnants of the vegetative gametophyt
8
Q
generative cell
A
vestiges of the ancestral antheridia
divides to form a sterile cell and spermatogenous cell
9
Q
tube cell
A
cell that develops into the pollen tube, structure that carries male gametes into ovule
