Answer:
<u><em>External Factors:</em></u>
The external factors which influence the cell cycle might be physical or chemical.
Physical factors: Physical signals involve the factors like when a cell touches another cell, it stops dividing.
Chemical factors: Chemical factors are the growth factors or growth proteins that trigger the cells to undergo the process of cell division.
<u><em>Internal factors:</em></u>
Kinases: Kinases are the proteins which determine whether the cell will undergo cell division or abort it.
Cyclins: When the signal is right for cell division, cyclins activate the kinases.
Explanation: We can turn of the lights when were not using them and use bike rids instead of car rides use solar panels.
Answer:
ought that sleep was a passive state, a time when a person's brain and body shut down for the night to rest and recover. But now, researchers know that sleep is a highly active time, a period during which the brain and some physiological processes may be hard at work.
For example, some hormones involved in growth in children, cell repair or digestion are boosted during sleep. Brain pathways involved in learning and memory also increase, according to the National Institutes of Health (NIH).
In fact, the brain is sometimes more active when a person is asleep than when he or she is awake, according to Harvard Medical School. But sleep can also slow down many other physiological processes, from heart rate and breathing to body temperature and blood pressure.
Explanation:
The answer of this question is right