Answer:
A. Nuclear fusion
Explanation:
The sun generates energy from a process called nuclear fusion. During nuclear fusion, the high pressure and temperature in the sun's core cause nuclei to separate from their electrons. Hydrogen nuclei fuse to form one helium atom.
<span>maintaining a stable internal environment</span>
Answer:
density independent
Explanation:
In Ecology, density independent factors are limiting factors that do not depend on the size of a population to affect such population. Examples of density independent limiting factors are fire outbreak, earthquake and other natural disasters.
According to this question, since density independent factors influence a population irrespective of its density, it will affect a larger population than a smaller population. For example, a fire outbreak will likely burn a large part of the population, if not all.
<span>Acute exposure to radioactive substances.
Acute exposure is radiation exposure that occurs in a short time period. It can be an exposure that occurs once in your lifetime. This might be that one foot x ray you had because you may have broken your foot. Acute exposure can also be exposures that occur more than once, but very infrequently and for short periods of time. This might be dental x rays you get every few years.</span>
Mutations in these genes can produce new or altered traits, resulting in heritable differences (genetic variation) between organisms. ... One definition of a species is a group of organisms that can reproduce with one another and produce fertile offspring.
