Unit 4.2 - Development of Pollen Flashcards
1
Q
what contains the male gamete
A
pollen grains
2
Q
where are pollen grains formed
A
inside pollen sacs
3
Q
where are pollen sacs located
A
within the anther.
four pollen sacs arranged in two pairs, side by side
4
Q
what happens to the tapetum as pollen grains develop
A
gets smaller / decreases in size
5
Q
what is the tapetum
A
Inner wall of cells that provide nutrients to the developing pollen grains
6
Q
what is dehiscence
A
when the pollen grains are released
7
Q
where is the area of dehiscence
A
stomium
8
Q
how does dehiscence occur
A
when pollen grains are mature, outer layers of anther dry out.
= tension
walls of anther pull apart, releasing pollen grains
9
Q
A
