CH. 28 & 29 - Ch. 28 + 29 Plant- photosynthetic...

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Ch. 28 + 29 Plant - photosynthetic eukaryote- use chlorophyll A & B, it stores carbohydrates, develops from an embryo, which is protected by parent tissue. Monophyletic - from a single branch on tree of evolution. Embryophyte - they form embryos & develop from them. The closely living relative to them (plants); green algae- charophytes. Plants- first thing to move on land, as they moved onto terrestrial environment, they had to undergo many adaptations. 1) Had to produce a cuticle- waxy covering that prevents the plant from drying out- desiccation. 2) Had to develop gamitangie (specialized gamete) - preventing the gamete from drying out. 3) Embryos- a young sporophyte which was contained in a protective structure. 4) Needed pigments to protect from sun’s harmful UV rays. Evolved or created a thick spore wall- to prevent spore from drying out. Plants evolved a mutualistic relationship with fungus (earliest form of two things working together). Fungus- fixes nitrogen for plant Plant- lets fungus feed off it. On land transformed environment themselves, initially lots of rocks; plants released acid compounds to break down rocks to make soil. Characterizes a plant: Lifecycle - alternation of generations- consists of Multicellular, haploid individual then Multicellular, diploid for the other part of the time. Gametophyte
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CH. 28 & 29 - Ch. 28 + 29 Plant- photosynthetic...

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