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Evolution

Across
To sleep during winter to survive on stored body fat
Allows only certain species to mate with another
Change in a organism over a period of time
A rounded part of a plant
A group of alike organisms
Carries water from roots to leaves
To live in a environment
Down
To improve ability to live in a enviorment
The moving of organism from one region to another
On the inside
When organism that are better suited with there environment get to live
Having from birth
On the outside
Used to obtain oxygen from water