B. A form of energy coupling refers to using the release of energy from exergonic hydrolysis of ATP to initiate other endergonic reactions for cellular metabolism.
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Answer: A penumbral lunar eclipse occurs when the Sun, Earth, and the Moon are imperfectly aligned.
Explanation: During this occurance the Earth comes between the Sun and moon and blocks the sunlight from falling on the moon.
Answer:
This is usually the first day of menstruation - the day when the uterus lining starts to be shed.
Explanation: