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Science Words L1 222

Words for Lesson 1

TermDefinition
Cell (sel), The basic unit of a living organism.
Virus (v`ires) A tiny particle that can reproduce only inside the cells of living things.
Bacteria (back tir`ea) Tiny one-celled organisms, some of which can cause diseases.
Nucleus (nu`kle es) The cell part that controls the controls the cells activities.
Cytoplasm (si teplaz em) Jellylike material that fills most of a cell.
Cell wall A stiff outer layer that helps keep plant cells firm.
Cell membrane A thin layer that's the outside of the cell and controls what enters and leaves it.
Chloroplast The green cell part in plant cells that traps and uses light energy.
Created by: jacob.a.troiani
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