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Chapter 3 Vocabulary
protists
19
Science
7th Grade
10/26/2012

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Term
Protist
Definition

An organism that belongs to the kingdom Protista

Term
Heterotroph
Definition

An organism that gets food by eating other organisms or their byproducts and that cannot make organic compounds from inorganic material

Term
Parasite
Definition

An organism that feeds on an organism of another species (the host) and that usually harms the host; the host never benefits from the presence of the parasite

Term
Host
Definition
An organism from which a parasite takes food or shelter
Term
Protist Producer: Algae
Definition

Eukaryotic organisms that convert the sun’s energy into food through photosynthesis but do not have roots, stems, or leaves

 

Types of algae: red, green, brown

Term
Protist Producer: Phytoplankton
Definition

The microscopic, photosynthetic organisms that float near the surface of marine or fresh water

 

Example: Diatoms

Term

Cilli

Definition

tiny hair like structures

Term

Colonies


Definition
individual cells of some species of green algae live in groups called colonies
Term
pseudopodia
Definition
"false feet"
Term
flagella
Definition
whip like strand; helps move
Term
Conjugation
Definition
two individuals join together and exchange genetic material by using a small nucleus, then divide to produce 4 offspring that have new combinations of genetic material
Term
multiple fission
Definition
process resulting in more than two offspring from one parent
Term
food vacuole
Definition
enzymes move into this to help digest food
Term
contractile vacuole
Definition
pumps out excess water
Term
Eukaryotic
Definition
Cell that has a nucleus
Term
Protozoan
Definition
Mobile (it can move) protist
Term
Pseudopod
Definition
False foot (amoebas use to move around)
Term
Eyespot
Definition
Structure that senses light (Euglenoids have them)
Term
Chloroplast
Definition
Structure in which photsynthesis takes place
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