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Science Chapter 1

Across
The control center of a cell's activities
A plant's cell part that allows it to collect energy from the sun and make its own food.
Animals that do not have a backbone
Physical feature or behavior that helps animals survive, get food, move and reproduce
An exact likeness in size and shape between two halves of an object
Down
A group of living things that is so much alike that they can reproduce
A gel-like liquid inside a cell
The basic unit of all living things
Animals that have a backbone
One-way doors that control the direction on blood flow
A group of similar tissues that join together to do a job