Answer: The mesosphere starts at 31 miles (50 km) and extends to 53 miles (85 km) high. The top of the mesosphere, called the mesopause, is the coldest part of Earth's atmosphere, with temperatures averaging about minus 130 degrees F (minus 90 C). This layer is hard to study
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Answer: the answer is simple its adding chemical fertilizers to the soil
Explanation:
Humans can alter the phosphorus cycle in many ways, including in the cutting of tropical rain forests and through the use of agricultural fertilizers. Crops often cannot absorb all of the fertilizer in the soils, causing excess fertilizer runoff and increasing phosphate levels in rivers and other bodies of water.
Body movement produced by skeletal muscles that require the use of energy is referred to as physical activity.
<h3>What is Physical activity?</h3>
This involves the movement of the skeletal muscles when performing different actions in our day to day activities.
It requires the use of energy to fuel the process which is the main reason why calorie intake is vital in every individual.
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Answer:
Calcitonin causes bone to be broken down.
Explanation: