The atmosphere is a mixture because it contain many types of gases , liquids and solids.
Answer:
in the explanation box
Explanation:
body's immune system trying to protect the wound from infection. The wound becomes red because blood vessels are opening so blood can bring oxygen and nutrients to the cut area, oxygen is needed for healing.
Answer:
Hi, there your answer is A. Genes
Explanation:
They are used to define periods Geological time.
