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Bio Puzzle

Across
A science that deals with things that are alive (such as plants and animals.)
Related to the measurement and analysis of unique physical or behavioral characteristics ( as fingerprint or voice patterns) Especially as a means of verifying personal identity.
Capable of being slowly destroyed and broken down into very small parts by natural processes, bacteria, etc.
The story of a real person's life written by someone other than that person.
Down
A large naturally occurring community of flora and fauna occupying a major habitat, e.g., forest or tundra.
A biological or chemical substance or situation that is dangerous to human beings and the environment.
The part of the earth crust, waters, and atmosphere that supports life.
The existence of many different kinds of plants and animals in an environment .