Answer:
For natural selection to occur, it is true that there must be genetic variation in the population.
Explanation:
According to evolution, natural selection implies the changes that occur in the genotype of a species, due to the effect of environmental factors, and which guarantee its survival through adaptive evolution.
For natural selection to occur, three fundamental conditions must exist:
A trait that can be inherited from one generation to another.
The trait is subject to variability between subjects of the same species.
Genetic variability can determine the possibility of reproductive success and survival.
Therefore, a necessary factor for natural selection to occur is that genetic variability exists in the population.
Answer:
Planck's famous black body radiation law
Explanation:
We measure the temperature of the universe by using Planck’s famous black body radiation law. This law states that every object radiates electromagnetic energy according to its temperature.
Therefore, "<u>Planck's famous black body radiation law</u> measures the temperature variations in the universe.
* I hope this helped :)
<span>D)<span>About 50% are heterozygous for tall stems.</span></span>
During the sympathetic reaction the blood flow is augmented
to the skeletal muscles and brain. Then the blood flow will diminished to the
bowel which may led to constipation. The person will perspire excessively and
may lead to dehydration which eventually may constrain bowel function.
