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Unit 5: Protists
Vocabulary definitions for unit 5
20
Science
7th Grade
12/01/2010

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Term
PROTOZOAN
Definition
An animal-like protist
Term
PSEUDOPOD
Definition

A "false foot" or temporary bulge of the cell membrane used for feeding and movement in some protozoans

Term
CONTRACTILE VACUOLE
Definition
The cell structure that collects extra water from the cytoplasm and then expels it from the cell.
Term
CILIATES
Definition
animal-like protists that use cilia to move, obtain food, and sense the environment
Term
CILIA
Definition
Hairlike projections on the outside of cells that move in a wavelike pattern
Term
ZOOFLAGELLATES
Definition
animal-like protists that use flagella to move
Term
SYMBIOSIS
Definition
A close relationship between two organisms in which at least one of the organisms benefit
Term
MUTUALISM
Definition
A type of symbiosis in which both partners benefit from living together. Example: Clownfish and Sea Anemone
Term
SPOROZOANS
Definition
Group of animal-like protists that are parasites and feed on the cells of their hosts.
Term
PLASMODIUM
Definition
A sporozoan that causes malaria, a serious disease of the blood.
Term
SPORE
Definition
A tiny cell that is able to grow into a new organism
Term
SLIME MOLDS
Definition
A fungus-like protist that live in moist soil and on decaying plants and trees.
Term
ALGAE
Definition
Plantlike protists
Term
PIGMENTS
Definition
Chemicals that produce color
Term
EUGLENOIDS
Definition
Green, unicellular algae that are found mostly in fresh water. Unlike other algae, they can be heterotrophs when sunlight is scarce. They also have an eyespot.
Term
DINOFLAGELLATES
Definition
Unicellular algae covered by stiff plates that look like suits of armor. Many glow in the dark.
Term
DIATOMS
Definition
Unicellular algae with beautiful glasslike cell walls. They are a food source for heterotrophs in the water.
Term
ALGAL BLOOMS
Definition
The rapid growth of a population of algae
Term
RED TIDE
Definition
An algal bloom that occurs in salt water.
Term
EUTROPHICATION
Definition
The buildup over time of nutrients in freshwater  lakes and ponds that leads to an increase in the growth of algae.
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