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Epic Science Chap. 1

Chapter one vocabularly from unit a

TermDefinition
Virus A tiny particle that can only reproduce inside the cells of living things
Bacteria Tiny one-celled organisms, some of which can cause diseases
Cell The basic unit of a living organism
Cell Membrane A thin layer that makes up the outside of a cell and controls what enters and leaves it
Nucleus The cell part that controls a cell's activities
Cytoplasm Jellylike material that fills most of a cell
Cell Wall A stiff outer layer that keeps plant cells firm
Chloroplast The green cell part in plant cells that traps and uses light energy
Classify To arrange in groups using a system
Kingdom The largest group into which an organism is classified
Genus A group of similar species
Species A group of organisms of only one kind that can interbreed in nature
Invertebrate An animal that has no backbone
Vertebrate An animal with a backbone
Mammal An animal with hair or fur and feeds its young with milk produced by the mother
Vascular Plant A plant with long tubes inside that carry food and water to all the parts of the plant
Egg Cell A cell that can join with a sperm cell to form a new individual
Sperm cell A cell that can join with an egg cell to form a new individual
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