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Apologia Biology Module 3
Vocabulary from module 3: Kingdom Protista
23
Biology
10th Grade
05/29/2012

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Term
Pseudopod
Definition
A temporary, foot-like extension of a cell, used for locomotion or engulfing food
Term
Vacuole
Definition
A membrane-bounded "sac" within a cell.
Term
Ectoplasm
Definition
The thin, watery cytoplasm near the plasma membrane of some cells
Term
Endoplasm
Definition
The dense cytoplasm found in the interior of many cells
Term
Flagellate
Definition
A protozoan that propels itself with a flagellum
Term
Pellicle
Definition
A firm, flexibla coating outside the plasma membrane
Term
Chloroplast
Definition
An organelle containing chlorophyll for phototsynthesis
Term
Chlorophyll
Definition
A pigment necessary for photosynthesis
Term
Eyespot
Definition
A light sensitive region in certain protozoa
Term

Symbiosis
Definition
A close relationship between two or more species where at least one benefits
Term
Mutualism
Definition
A relationship between two or more organisms of different species where all benefit from the association.
Term
Commensalism
Definition
A relationship between two organisms of different species where one benefits and the other is neither harmed nor benefited
Term
Parasitism
Definition
A relationship between two organisms of different species where one benefits and the other is harmed.
Term
Cilia
Definition
Hairlike projections that extend from the plasma membrane and are used for locomotion
Term
Spore
Definition
A reproductive cell with a hard, protective coating
Term
Plankton
Definition
tiny organisms that float in the water
Term
Zooplankton
Definition
Tiny floating organisms that are either small animals or protozoa
Term
Phytoplankton
Definition
Tiny floating photosynthetic organisms, primarily algae
Term
Thallus
Definition
The body of a plant-like organism that is not divided into leaves, roots or stems
Term
Cellulose
Definition
A substance (made of sugars) that is common in the cell walls of many organisms
Term
Holdfast
Definition
A special structure used by an organism to anchor itself
Term
Sessile Colony
Definition
A colony that uses holdfasts to anchor itself to an object.
Term
Nucleus
Definition
The region of a eukaryotic cell that contains the cell's main DNA
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