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23 terms

Apologia Biology 2nd Ed. Module 3

Apologia Biology 2nd Ed. Module 3 vocabulary
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pseudopod
a temporary, foot-like extension of a cell, used for locomotion or engulfing food
nucleus
the region of a eukaryotic cell that contains the cell's main DNA
vacuole
a membrane-bounded "sac" within a cell
ectoplasm
the thin, watery cytoplasm near the plasma membrane of some cells
endoplasm
the dense cytoplasm found in the interior of many cells
flagellate
a protozoan that propels itself with a flagellum
pellicle
a firm, flexible coating outside the plasma membrane
chloroplast
an organelle containing chlorophyll for photosynthesis
chlorophyll
a pigment necessary for photosynthesis
eyespot
a light-sensitive region in certain protozoa
symbiosis
a close relationship between two or more species where at least one benefits
mutualism
a relationship between two or more organisms of different species where all benefit from the association
commensalism
a relationship between two organisms of different species where one benefits and the other is neither harmed nor benefited
parasitism
a relationship between two organisms of different species where one benefits and the other is harmed
cilia
hairlike projections that extend from the plasma membrane and are used for locomotion
spore
a reproductive cell with a hard, protective coating
plankton
tiny organisms that float in the water
zooplankton
tiny floating organisms that are either small animals or protozoa
phytoplankton
tiny floating photosynthetic organisms, primarily algae
thallus
the body of a plant-like organism that is not divided into leaves, roots, or stems
cellulose
a substance (made of sugars) that is common in the cell walls of many organisms
holdfast
a special structure used by an organism to anchor itself
sessile colony
a colony that uses holdfasts to anchor itself to an object