Answer: the lightest and the darkest skin pigmentations are equally common in the population
Explanation:
Answer:
The Earth is essentially a closed system; it obtains lots of energy from the Sun but the exchange of matter with the outside is almost zero. Isolated systems can exchange neither energy nor matter with an outside system.
The Precambrian was originally defined as the era that predated the emergence of life in the Cambrian Period. It is now known, however, that life on Earth began by the early Archean and that fossilized organisms became more and more abundant throughout Precambrian time.
The mass of the star actually determines the stage of the
star after supernova. If the mass of the star is small, then it would become a
very small and dwarf, cold and dead body in space. The mass of the star has to
be less than that of the sun. If the mass of the star is greater than sun, then
it would become a black hole. The mass of the star has to be more than 1.4
times the mass of the sun to become a black hole.
C. evaporation of sweat warms the body
Natural selection allows nature to chose which species survives. Only the fittest get to pass on their genes. And by fittest i mean the ones that are better adapted to the environment.<span />
