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Glossary of Sciene Chapter 1 Grade 5

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Nucleus
The cell part that controls the cell's activities
Virus
A tiny particle that can reproduce only inside the cells of living things.
Cell
The basic unit of a living organism.
Cytoplasm
Jellylike material that fills most of a cell.
Cell Wall
A stiff outer layer that helps keep 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 closely related species
Species
A group of organisms that have the same traits and can interbreed in nature.
Invertebrate
An animal that has no backbone
Vertebrate
An animal with a backbone
Mammal
An animal that has hair or fur and feed and feeds its young with milk produced by the mother.
Vascular Plants
A plant with long tubes inside that 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.
Cell Membrane
a thin layer that makes up the outside of the cell and controls what enters and leaves it.
Bacteria
tiny one-celled organism, some of which can cause disease.

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