D. Gravity and Distance. The distance earth is from the sun is what's keeping us from barreling into the mass of flame and heat. The distance between us and the moon is what keeps the moon from crashing into us. It could not be C, as the definition of inertia is: "a property of matter by which it continues in its existing state of rest or uniform motion in a straight line, unless that state is changed by an external force." Hope this helps :)
Answer;
Light microscope
Explanation;
A light microscope uses focused light and lenses to magnify a specimen, usually a cell.
Light microscopes may be simple microscopes or compound microscopes.
Simple microscopes uses a single lens to magnify an object and cannot reach high magnification.
Compound light microscopes use two sets of lenses that is; an objective lens and an eyepiece, to produce images.
The final electron acceptor is indeed oxygen but let me explain it better: This process occur during cell metabolism. The thing is that the potential of NADH and FADH2 is converted into more ATP, which is the <span>Adenosine triphosphate, through an electron chain that contains oxygen and that is why is called the terminal electron acceptor. </span>
When there is heavy competition between two species these results may surface. First, even if there is just a little advantage of one species, the tendency is the best competitors will dominate the other. This may lead to the extinction of the weaker species. Another result is, competition may cause the traits of the competing species to evolve. This result is called character displacement. This is what happens when for instance the species live in the same area and have the same and common niche; the characteristics of the species evolve in order for them to minimize niche overlap. This is also for them not to have competitive exclusion. To add to that, when there is heavy competition, the finite resources will not be enough for all competitors who have all access to the resources. This may lead to very low survival rates.
