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kolezko [41]
3 years ago
5

The sun rotates

Biology
1 answer:
Marina CMI [18]3 years ago
6 0

Answer: B

Explanation: the sun is made of gas, which doesn't all spin together at the same speed like a solid rock would.

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HACTEHA [7]

Answer:

The correct answer will be option-D.

Explanation:

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Calcium triggers the muscle contraction cycle as these calcium ions bind to the troponin-tropomyosin complex. This binding exposes the myosin-binding site on the actin on which high energy myosin binds and cross-bridge is formed.

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