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Unformatted text preview: | Many Archegonia form in Ovule | Eggs form Year Three Early Season A. Fertilization Eggs + Sperms | Zygotes | Many embryos start developing | One embryo per ovule survives and matures | Seed B. Seed Maturation Ovule integuments form seed coat Embryo has many cotyledons Nucellus provides nutrients Cone scale (or fleshy aril in Yew) protects Year Three Late Season Seed Release Cone scales usually open to release seeds in fall Some cones stay sealed until appropriate condition for germination occurs (such as in Redwoods, which germinate best after fire) Some cone scales are deciduous, as in true firs. Some cone scales are fleshy, such as the aril of yews...
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This note was uploaded on 01/08/2012 for the course BIO 213 taught by Professor Makina during the Fall '09 term at SUNY Stony Brook.
- Fall '09