Alternation of Generations: Occurs when a plant's life cycle alternates between a sex cell-producing stage and a spore-producing stage.

(Ch. 5 pg. 125)

Stamen: Male reproductive organ inside the flower of an angiosperm; consists of a filament and an anther.

(Ch. 5 pg. 133)

Sporophyte (SPOR uh fite) Stage: Plant life cycle stage in which all plant sturctures are made of cellls with a diploid number (2n) of chromosomes.

(Ch 5 pg 124)

Sori: Spore-producing structures on the undersides of fern fronds.

(Ch. 5 pg. 126)

Pollen Grains: Produced by the mail reproductive organs of seed plants; two sperm develop in each pollen grain.

(Ch. 5 pg. 130)

Rhizome: Underground stem of a fern, from which a root grow

(Ch. 5 pg. 126)

Prothallus: Fern gametophyte which can make its own food, absorb water and nutrients, and has both mail and female reproductive structures.

(Ch. 5 pg. 126)

Pollination: Transfer of the pollen grains from the stamen to the stigma.

(Ch. 5 pg. 134)

Pistil: Female reproductive organ inside the flower of an angiosperm; consists of a sticky stigma, a style and an ovary.

(Ch. 5 pg. 133)

Gametophyte (ghu MEET uh fite) Stage: Plant life cycle stage in shich all plant structures are made of cells with a haploid number (n) of chromosomes.

(Ch. 5 pg. 124)

Ovary: In angiosperm, the swollen base of the pistil where the ovules are formed.

Frond: Leaf of a fern that grows from rhizome.

(Ch. 5 pg. 126)