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Life Science Exam Flashcards
xlife science exam!x
5
Science
7th Grade
11/22/2006

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Term
cell wall
Definition
~the rigid outer layer that provides suppposrt for the cell and allows plants to grow upright

~only in plants

~made of cellulose (a kind of sugar)
Term
cell membrane
Definition
~"case" around cell that protects it

~gives cells their shapes

~controls what goes in/out of cell~the "outer boundary"

~small things go through fats, big things go through proteins

~helps maintain homeostasis
Term
nucleus
Definition
~like the cell's captain/brain

~controls all of the cell's activities

~home of DNA
Term
nuclear membrane
Definition
~similar to cell membrane except around nucleus

~controls what goes in and out of nucleus

~does for nucleus what cell membrane does for cell
Term
cytoplasm
Definition
~gelatinlike material in cell

~mostly water

~organelles (other cell structures) float around in this
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