Biology Basics

Clues in this puzzle

Across

• The small part of a plant that can grow into a new one (4)
• An organ used for breathing air (4)
• The organ used for seeing (3)
• A fiber that sends signals to the brain (5)

Down

• The outer layer of the body (4)
• The molecule that carries genetic information (3)
• The basic unit of all living things (4)
• A segment of DNA that determines a trait (4)

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