Chapter 12 - Algae Flashcards
(17 cards)
Classification of Algae
Domain (Eukarya) / Kingdom (Protist) / Subkingdom (Algae)
Characteristics of Algae
Eukaryotic / Uni or Multi- Cellular / Photoautotrophic / Chloroplasts
Algae from chains of cells called
filamentous
Algae is classified into Phylums by pigments
Phaeophyta (Brown), Rhodophyta (Red), Chlorophyta (Green)
Cells covering the Body of Algae that carry out photosynthesis
Thallus
Algae absorb their nutrients through the water over what part
Entire surface (Thallus)
Root-like anchors that attach algae to rocks
Holdfasts
Stem-like structure that does NOT offer support
Stipe (support provided by water)
Leaf-like structure
Blade
Habitat of Algae
Aquatic ,soil, rocks, plants / Cool water / most in ocean
Location of Algae
depends on nutrients, wavelengths of light, and surfaces on which to grow
Algae Reproduction
All Asexually by binary fission or fragmentation. / Sexually less frequently
Phylum Phaeophyta (Brown)
Kelp* Macroscopic, Algin extracted from cell walls used in (ice cream, rubber tires, hand lotion)
Phylum Rhodophyta (RED)
found DEEPer in ocean, used to make agar (thickening agent in ice cream, evaporated milk)
Phylum Chlorophyta (GREEN)
microscopic, uni & mulicellular, cellulose cell walls contain Chlorophyll A and B
Volvox, Spirogyra
Diatoms
- most numerous unicellular algae
- some are filamentous
- important in food chain –primary food source for filter feeders (clams, oysters and mussels)
- have characteristic Frustules (Rigid Shells)
Dinoflagellates
Unicellular algae, collectively know as Plankton
- photosynthetic - have rigid shells (frustules) - equitorial Groove - cause red tide
