1
2 Gametophyte/sporophyte relationships
3
Phylum Coniferophyta4
*pollen grain= male gametophyte
(4 cells)
1 tube cell
1 generative cell- 2 sperm nuclei
2 prothallial cells
**ovule= integument,
megasporangium, megaspore
**
*male
female
Life cycle of a conifer
5
p. 579
1000s of cells
wind
main means of
dispersal
6
male cones (strobili) with sporophylls
7
microsporophyll
microsporangium
(pollen sac)
pollen (male or
microgametophyte)
8
male cone
9
pollen grains (male gametophytes)
tube and generative cell wings
10
megasporophylls
11
female cones
12
sporophyll
ovule (megasporangium)
ovule
micropyle
13
wingseed
14
1 tube cell
1 generative cell
w/ 2 nuclei
(7 cells, 8 nuclei)
double fertilization
fruit
Life cycle of a flowering plant15
p. 600
16
anther
microsporangium
pollen
microgametophytes (male)
or pollen
17
anther
pollen
microsporangium
w/
microgametophytes
or pollen
18
19
pollen= male gametophyte
composed of 2 cells
20
21
ovary
ovule or
megasporangium
megagametophyte
(female) or embryo
sac
22
ovary
female gametophyte
ovule
Monocots
vs
Dicots (=Eudicots)
23
24
cotyledon
plumule
radicle
seed coat
young sporophyte
eudicot=
dicot
25
p. 778
26
p.780
27
28
Fruits
29
thickened wall
of fruit