Angiosperm life cycle.
Review and exercise:
- Anthers contain microsporangia which produce microspores by meiosis.
- Microspores form male gametophytes (pollen grains) by mitosis.
- Ovaries contain ovules where megasporangia produce megaspores
- Megaspores form female gametophytes (embryo sacs) by mitosis.
- After pollination,
double fertilization occurs.
- The diploid
zygote develops into an embryo within a seed.
- A seed uses the triploid
endosperm as food to germinate into a large sporophyte.