Answer:
Asteroid impacts were uncommon when life is presumed to have begun.
Explanation:
The hypothesis about the origins of life on Earth are based upon the asteroid impacts. Basically, the hypothesis suggests that the asteroids brought the basic ingredients for the development of life on our planet. If a discovery is made though that in the period when life occurred the asteroid impacts were lacking, then this hypothesis will fall into water. This is because the hypothesis is directly dependent on the asteroid impacts, so if the case was that there weren't, or were very rare, the hypothesis will lose its basis.
According to Newton's 1st law of motion, called the law of inertia, if you kick a soccer ball on a field of grass, it will stop because <u>friction.</u>
Answer: Both vasoconstriction and vasodilation.
Explanation:
The mechanism that controls the blood flow to various parts of the body is vasoconstriction and vasodilation.
Vasoconstriction can be defined as the phenomenon in which blood vessels decrease in diameter to decreases, the pressure in the blood vessels also increases which in turn increases the blood flow.
Vasodilation can be defined as the phenomenon in which the diameter of blood vessels increases and the pressure in the blood vessels decrease and blood flow decreases.
This increases and decreases the blood flow so as to make the blood reach each and every part of the body.
Cell wall because it protects the cell membrane.