ch 2 sexual reproduction in flowering plants Flashcards
1
Q
angiosperm
A
bilobed with each lobe having two theca, i.e., dithecous
2
Q
anther
A
four sided (tetragonal) structure consists of four microsporangia
3
Q
microsporangium
A
four layers- epidermis, endothecium, middle layers(protection), tapetum(nutrition)(dense cytoplasm, generally have more than one nucleus)
sporogenous tissue occupies centre
4
Q
microsporogenesis
A
as the anther develops, the cells of the sporogenous tissue undergo meiotic divisions to form microspore tetrads
5
Q
microsporogenesis
A
process of formantion of microspores from a pollen mother cell through meiosis
6
Q
pollen grain
A
male gametophyte
7
Q
pollen grain
A
25-50 mm in diameter
8
Q
exine
A
sporopollenin
9
Q
intine
A
cellulose and pectin
10
Q
parthenium or carrot grass
A
cause pollen allergy
11
Q
syncarpous
A
fused pistil
12
Q
apocarpous
A
free carpels
