BSC 1011- Midterm Exam Guide - Comprehensive Notes for the exam ( 61 pages long!)
11 Oct 2017
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Document Summary
Produce megaspores which give rise to female (egg-containing) gametophytes. Produce microspores which give rise to male (sperm-containing) gametophytes. Common trait b/w the megaspores of angiosperms and gymnosperms. Both protect the internalized gametophyte from the environment. Importance of pollen in fertilization after the carboniferous period. It eliminated the liquid water requirement for fertilization. The transfer of of pollen to the vicinity of the ovule. It germinates and grows as a pollen tube into the ovule where it delivers one or two sperm into the female gametophyte. An embryo packaged with a supply of nutrients inside a protective coat. Advantages of seeds over spores. the seed enables the plants to resist harsh environments and disperse more widely. The zygote forms a develops into a sporophyte embryo within the ovule. The ovule integuments then harden and develop into a seed, consisting of the embryo and its food supply within a protective coat.
