Biology Notes 2-11-08

Biology Notes 2-11-08 - spores become gametophytes by...

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Biology Notes February 11, 2008 Evolution of Seeds: Homospory is primitive (mosses and ferns). Heterospory evolved from homospory. Zygote = 2n mitosis = sporophyte Sporophyte makes sporangia, sporangia makes spores by mitosis (ploidy changes!),
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Unformatted text preview: spores become gametophytes by mitosis (haploid) female gametophytes develop inside sporangium. After the male fertilizes, it produces a new sporophyte. This grows into an embryo, inside the seed....
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