The correct option is B.
Harry Harlow was an American psychologist, who through his study proof that children need love and affection to develop normally. He demonstrated this by using rhesus monkey babies, who are taken away from their mothers immediately after birth. In place of their real mother, Harry provided two surrogate mothers instead and allow the monkey to chose any one they prefer. The first surrogate mother was made of wire and monkeys can get food from her while the second surrogate mother was made of soft terry cloth but the monkey can not get any food from her. Harry observed that the monkeys prefer to stay with their terry cloth mother, which provide comfort and security than with the one made of wire. The monkeys only go to the wire mother when they are hungry.
Answer:
The correct option is <em>C) As cells become more numerous, the amount of required growth factors and nutrients per cell becomes insufficient to allow for cell growth.</em>
Explanation:
During the process of growth of a cell, it requires adequate amount of nutrients and growth factors to develop all the complex organelles and right growth size of the cell.
As the cell number increases, the nutrition required for these cells begins to deplete. This acts as a signal for the body to produce more cells. Once the nutrients and growth factors become abundant again the cells starts its process of growth again.
Answer:
- Oxygen
- The body cells
- Producing energy
Explanation:
We breathe in oxygen from the external environment. Oxygen passes into our lungs and is passed into the blood capilaries. Here it is carried to all the cells throughout the body.
It diffuses into the cells and is necessary for the final stages of energy production by aerobic respiration. Therefore, it is necessary for powering all cellular processes.
