ing, and suspension agent for ice cream, pudding, frozen foods, toothpaste, floor
polish, cough syrup, and even jelly beans.
The organic matter that kelp produces supports the life of invertebrates,
marine mammals, and fish.Green Algae
Green algae can live in moist places on land, such as tree trunks and in the soil,
as well as in water. There are 7,000 species of green algae that are diverse in
size, morphology, lifestyle, and habits. Scientists believe that some members of
the species are linked structurally and biochemically to the Plant kingdom.
Two common green algae are:1.Spirogyra: Spirogyraare freshwater algae that have tiny filaments, each
containing spiraling bands of chloroplasts.
2.Volvox: Volvox are colonial multicellular green algae that have flagella and
live in marine, brackish, and freshwater environments.LICHENS
Lichens are filaments of a fungus and cells of algae (this is a symbiotic rela-
tionship) that are found on exposed soil or rock, on trees, on rooftops, and on
cement structures. There are about 20,000 known species of lichens.
Survival of the green algae and the fungus are interdependent in a symbiotic
association. Neither can live without the other. However, each grows independ-
ently. Lichens are delicate and beautiful in appearance.Protozoa
This organisms are members of the Kingdom Protista.There are about 20,000
known species of protozoa that live in water and soil. Some feed on bacteria
while others are parasites and feed off their hosts.
Most protozoa are asexual and reproduce in one of three ways. These are:- Fission:Fission occurs when a cell divides evenly to form two new cells.
- Budding:Budding occurs when a cell divides unevenly.
(^174) CHAPTER 11 The Eukar yotes