They are divided into ecozones
A. Pedigree is a tool that shows genetic traits that run in a family, such as cancer.
Answer:
A mutation is a change that occurs in our DNA sequence, either due to mistakes when the DNA is copied or as the result of environmental factors such as UV light and cigarette smoke.
Explanation:
All organisms do have a closed circulatory system
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Coal. -from my dad lol ill check