Domain bacteria, Domain Archaea and Domain Eucarya
Answer:
i know some whatcha need?
Explanation:
Mitochondria are found in plant cells...? I'm not too sure.
Answer:
<u>Once the myosin-binding sites are exposed, and if sufficient ATP is present, myosin binds to actin to begin cross-bridge cycling. Then the sarcomere shortens and the muscle contracts. In the absence of calcium, this binding does not occur, so the presence of free calcium is an important regulator of muscle contraction.</u>
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