Answer:
Explanation:
Now leave the paper in the container overnight. In the morning, look at the paper and write down your observations.
what am i supposed to do????
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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to rech the sunlight for food or nurishments
<span>b. a cell takes in DNA from outside the cell.</span>