Chapter30GreenPlants[1]

Chapter30GreenPlants[1] - Chapter 30: Green Plants Note:...

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Chapter 30: Green Plants Note: The group Green Plants includes both land plants AND green algae. Reasons: closely related to land plants and form a monophyletic group with them both contain chloroplasts with chlorophyll a and b and B-carotene; thylakoid membranes similar sperm and peroxisomes are the same cell walls are similar in composition both store energy as starch I. Why do biologists study green plants? a. Ecosystem services i. Produce oxygen gas by photosynthesizing ii. Fix carbon dioxide gas and use it to make sugar iii. Build soil by contributing organic matter iv. Prevent erosion by holding soil particles together with roots v. Prevent runoff by softening rain drop impact and holding water vi. Moderate local climate by reducing temperature and increasing humidity vii. Provide food for herbivores b. provide humans with goods and services i. provide food ii. provide fuel (wood, coal, peat, petroleum) iii. provide fibers for textiles and rope iv. provide lumber for building material v. provide drugs (Table 30.1) II. How do biologists study green plants? a. Morphological traits (Land Plants) i. Nonvascular ii. Seedless vascular iii. Seed plant 1. gymnosperms 2. angiosperms b. using the fossil record (fig 30.8) i. 700-725 mya – green algae in rocks (700 mya – diversificationof green algae; high oxygen in oceans ii. 475 mya – first land plants – spores with sporopollenin, cuticle, spore-producing structures
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This note was uploaded on 11/11/2009 for the course BLY 459 taught by Professor Obrien,j during the Spring '08 term at S. Alabama.

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Chapter30GreenPlants[1] - Chapter 30: Green Plants Note:...

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