Chapter 30

Chapter 30 - microsporangia(male 4 Ovules and Production of...

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Chapter 30 Plant Diversity II: The Evolution of Seed Plants 1) The reduced gametophytes of seed plants are protected in ovules and pollen grains a) Characteristics common to all seed plants i) Seeds ii) Reduced Gametophytes iii) Heterospory iv) Ovules v) Pollen 2) Gametophye/Sporophyte Relationships a) Gametophytes of seed plants develop within the walls of spores retained within tissues of the parent sporophyte b) No longer dependent on water for fertilization 3) Heterospory: The Rule Among Seed Plants a) Seed plants have evolved from plats that had both megasporangia (female) and
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Unformatted text preview: microsporangia (male) 4) Ovules and Production of Eggs a) An ovule consists of a megasporangiun, megaspore, and protective integuments 5) Pollen and Production of Sperm a) Microspores develop into pollen grains i) Contain male gametophyte b) Pollen can be dispersed by air or animals, eliminates the water for fertilization 6) If a pollen grain germinates, a) It gives rise to a pollen tube that discharges two sperm into the female gametophyte within the ovule 7) Angiosperm Evolution a) Angiosperms originated 140 MYA...
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This note was uploaded on 02/04/2009 for the course BIOL 1202 taught by Professor Gregg during the Spring '08 term at LSU.

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