ALGAE
simple "aquatic plants"
characteristics
eucaryotic+chlorophyll and pigments
photoautotrophic
a. lack of vascular conducting system
b. simple reproductive structure, lack true leaves roots, flowers
cell walls of algae
cellulose fibrils but usually modified by addition of polysaccharide
strengthened with calcium carbonate
sometime chitin or silica or no cell wall
classification of algae
Subtopic
algal reproduction
asexual reproduction
fragmentation
spores
binary fission
sexual reproduction
algal ecology
seaweed
human food
secondary products
macroscopic form
primary producers of the ocean
habitat
a. aquatic habitat like fresh water
b. moist soils and artificial aquatic habitat
c. few in dry soils
d. acidic habitat
motility of algae
due to flagella only during sexual reproduction
a. single flagella- Euglena
b. 2 or 4 polar flagella- Chlorophyta
c. 2 flagella of different length and point of insertion- Dinoflagellates
distribution of algae
primarily aquatic
a. planktonic- suspended in aqueous environment
b. benthic- attached and living on the bottom of water
c. neustonic- at water-atmosphere interface
terrestrial
moist rocks, trees, soil
endosymbionts in protozoa, worms, corals, fungi (lichen)
classification based on
cell wall
flagella number and location
chlorophyll and pigments
morphology of cells
habitat
reproductive structures
life history patterns
taxonomy
chlorophyta (green)
rhodophyta (red)
phaephyta (brown)
chrysophyta (diatoms)
pyrrophyta (dinoflagellates)
euglenophyta