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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Answer:
D
Explanation:
im going to guess its a cause think of it this way its like family in a way if raccoons and red pandas are a more common ancestor than they might have been family along the lines of history somewhere if its not a than d i hop this helps and id pick d it sounds more frequent
You need three codons to make an amino acid.
Answer:
I think A, "Primary pollutants from a stationary source"
Explanation:
Got it right on exam :)
When houseflies try to imitate wasps, it is mullerian mimicry.
