Answer:
Many organs grouped together are called a tissue.
Many types of tissues can combine to form an organ.
Organs can be grouped by their function. These groups are called systems.
Explanation:
A,B,C
Guanine to Cytosine
G always matches C
A always matches T
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DNA copying is the answer
Water cycle
Water rains from the cloud into the ocean. Then the water gets sucked back up to atmosphere of the clouds
