Ch 30 - Plant Diversity II (1 slide per page)-1

No protection destiny sporopollenin layer will become

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Unformatted text preview: tophyte) # cells 1 Energy reserves? No Protection Destiny Sporopollenin layer Will become gametophyte Nonseed plant: After dispersed via wind germinates into independent gametophyte Seed plant: Microspore becomes ♂ gametophyte which is packaged as pollen Megaspore becomes ♀ gametophyte in ovule (which becomes seed) Many Yes Seed coat Will become sporophyte 28 Spore vs. Pollen Spores Description Pollen A haploid cell made in the sporangium of the sporophyte via meiosis A ♂ gametophyte (n) in a protective layer # cells 1 Multicellular Energy reserves? No No Protection Destiny Sporopollenin layer Will become gametophyte Nonseed plant: After dispersed via wind germinates into independent gametophyte Seed plant: Microspore becomes ♂ gametophyte which is packaged as pollen Megaspore becomes ♀ gametophyte in ovule (which becomes seed) Sporopollenin layer Upon arrival at ovule will develop a pollen tube and sperm which will fertilize egg in ovule. 29 Spore vs. Gamete Spores Description # cells Energy reserves? Protection Destiny Gamete A haploid cell made in the sporangium of the sporophyte via meiosis Haploid cell made in gametangium of gametophyte (n) via mitosis 1 1 No No Sporopollenin layer Will become gametophyte None Nonseed plant: After dispersed via wind germinates into independent gametophyte Seed plant: Microspore becomes ♂ gametophyte which is packaged as pollen Megaspore becomes ♀ gametophyte in ovule (which becomes seed) Sporophyte after fusion w/ another gamete Nonseed plant: Begins to mature into sporophyte immediately. Seed plant: embryonic sporphyte in seed matures later. Evolution of SEED Plants 30 Archaeplastida Viridiplantae Streptophyta Land Plants (Embryophyta) Vascular Plants ni fe ro Cy ca do ph yt G a ne to ph yt a G in kg op hy ta Li ve rw or ts M os se s or ts Ho rn w op hy ta Ch ar hl or op hy ta C Heterospory and reduced gametophyte ph yt a Seed Plants Seedless vascular Plants Co Nonvascular Plants Flowers Loss of Archegonia Loss of Antheridia Seeds and Pollen Microscopic Gametophyte Heterospory Dominant Sporophyte Vascular Tissue Ability to live on land Cicular proteins in ce...
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