It is the circulatory system and respiratory system.
DNA is made of a double helix of two complementary strands. When replicating, these strands seperate. Each strand of the original DNA then acts as a template for the production of it's counterpart, which is referred to as semiconservative replication.
Answer:
Earth's atmosphere is roughly 78 percent nitrogen and 21 percent oxygen, with trace amounts of water, argon, carbon dioxide and other gases. Nowhere else in the solar system is there an atmosphere loaded with free oxygen, which is vital to one of the other unique features of Earth: life
Answer:
Explanation:because of trying to produce a damage cell
Answer:
I think its
<h3><em><u>A.</u></em><em><u>
because it forms where fresh and salt water meet</u></em></h3>
Explanation:
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