plant project

plant project - ovulate cones • heterosporous tree •...

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Plant Groups Origin and Structure Of Reproduction Mode Of Nutrition Of Embryo Structure and Mode Of Transport Of Sperm Bryophytes • some are bisexual • female: archegonia- hold egg • male: antheridia- produce sperm • sexual reproduction • embryo retained in archegonia • layers of placental transfer cells and get nutrients to the embryo • swim through film of water to eggs • flagellated • enter archegonia in response to chemical attraction Seedless Vascular Plants • Sporangium- single type spore- bisexual gametophyte-eggs or sperm • Mega sporangium- megaspore-female gametophyte-eggs • Heterosexual & bisexual • Mega sporangium- microspore-male gamete-sperm • embryo retained in archegonia • layers of placental transfer cells help transport nutrients to embryo • swim through film of water to eggs • flagellated Gymnosperms • female: large
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Unformatted text preview: ovulate cones • heterosporous tree • sexual reproduction • megaspore mother cell • male: small pollen cones • ovule becomes seed consisting of embryo, food supply, and seed coat • pollen grain • enters micropyle and germinates, forming pollen tube that digests through megasporang ium • 2 sperm cells develop and unite with female gametophyte Angiosperms • sexual reproduction in flower • male: stamen; filament: stalk; anther: pollen produced • female: carpel; stigma: receives pollen; style: leads to ovary; ovary: contains 1 or more ovules • fruit-mature ovary • embryo and food in seed • seed contains embryo, endosperm, remnants of sporangium, and seed coat • pollen- two sperm • tube cell produces pollen tube • pollination occurs • sperm nuclei discharged in each ovule...
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This note was uploaded on 04/19/2011 for the course BIOCHEM 2 taught by Professor Staff during the Spring '08 term at Emory.

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plant project - ovulate cones • heterosporous tree •...

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