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