Which is the main reason cells are replaced in the body?

1 answer:

6 0

For example, when you skin your knee, cells divide to replace old, dead, or damaged cells. Cells also divide so living things can grow. When organisms grow, it isn't because cells are getting larger. Organisms grow because cells are dividing to produce more and more cells.

Explanation:

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Which statement about the central nervous system (CNS) and the peripheral nervous system (PNS) is true?

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Answer:

A is the correct answer

Explanation:

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Selina drops a golf ball down a deep well. The ball falls with only the force of gravity acting on it. Without any air resistanc

ss7ja [257]

Answer: A. constant

Without any air resistance, as the golf ball falls into the well, its speed is constant.

Explanation:

Given that when the ball is released,there is no air resistance acting on ball. So the ball is freely falling. 

The only force acting on the freely falling body is the gravitational force pulling the body towards the centre of the earth.Here the only acceleration acting on the body is the acceleration due to gravity.

The acceleration due to gravity is $9.8 m/s^2$ . so through out the journey of the ball,the acceleration is $9.8 m/s^2$ . So as the acceleration is constant, the speed is also constant.