Biology Notes 2-1-08

Biology Notes 2-1-08 - What about sex? If algae produced...

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Biology Notes February 1, 2008 Diatoms: -silica shell around a single celled organism -the shells are similar to a Petri-dish, the bottom nestles into the top. -used as filters, ie: pools Diatom Reproduction: Some Characteristics of Algae: Cell Walls: -Green Algae – cellulose and pectin -Brown Algae – cellulose and alginic acids Pigments: -Green Algae – chlorophylls A and B -Brown Algae – chlorophylls A and C Storage Product: -Green Algae – starch
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Biology Notes February 1, 2008 -Brown Algae – Mannitols Land Plants: made of cellulose and pectin, Chlorophylls A and B and stores starch. Which algal group gave rise to land plants? -The greens, most parsimonious explanation.
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Unformatted text preview: What about sex? If algae produced relatives that evolved into plants, what kind of sex cycle was involved?-Green algae sex includes: sporic or zygotic life cycle.-While sporic more closely resembles the gametic life cycle, the simplest answer is that the zygotic life cycle was the ancestral state. Questions: If land plants are most closely related to green algae, what kinds of adaptations did these early organisms need in order to become successful on land?-Structural integrity, retain water - cuticle, reproduction, lignin polymer for cell walls What happens to algae when you put an algae on the beach?-it drys out...
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Biology Notes 2-1-08 - What about sex? If algae produced...

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