Biology

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)
• The main trunk of a plant that supports leaves (4)

Down

• The outer layer covering a human body (4)
• An oval object from which a baby animal hatches (3)
• The basic building block of all living things (4)
• A tiny living thing that can cause disease (4)
• The part of a plant where photosynthesis usually happens (4)

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