Answer:
d.no pollution
Explanation:
it doest create any pollution at all
The correct answer is option B, that is, all living organisms are composed of one or more cells, which came from pre-existing cells.
A scientific theory refers to a well-substantiated illustration of some characteristic of the natural world, on the basis of a number of facts, which have been repeatedly confirmed via the experiment and observation. Such fact-supported theories are not hypotheses, however, are reliable explanations of the real world.
During the late 1830s, the zoologist Schwann and the botanist Schleiden were examining tissues and postulated the unified cell theory. According to the unified cell theory, all the living things comprises of one or more cells, the cell is the fundamental unit of life, and the new cells originate from the pre-existing cells.
The major homeostatic roles of kidneys in a healthy adults include; Regulation of the extracellular fluid volume, they ensure an adequate quantity of plasma to keep blood flowing to the vital organs. Regulating osmolarity; the kidneys help maintain appropriate concentration of the extracellular fluid with respect to the solutes in the fluid. The kidney regulates ion concentration ; including the sodium, calcium and potassium ions;. They also regulate the body pH; by preventing the blood plasma from being too acidic or basic. Another role is excretion of wastes and toxins, and lastly the production of hormones, such as erythropoietin which stimulates the synthesis of red blood cell.
Answer:
Minimizes repulsion between the valence electrons
Explanation:
The electrons repel each other, so the lowest energy state is one in which the electrons are as far from each other as possible.
Answer:
It helps organisms survive.
Explanation:
To elaborate, adaptive traits and behavior is learned because of a necessity to <em>survive</em>.
A good example might be vaccinations and your immune system. Your body needs exposure to a pathogen to learn what it does, then adapts to fight off the pathogen. It adapts to survive.
In a constantly changing world, if you can't adapt, you simply won't survive long enough.
