"Net force" simply means the sum of all forces. The "unless acted upon by a net force" version is more correct. For example, as you stand or sit still, the earth pushes you up with a force equal and opposite to the force with which gravity pulls you down. The net force, or total force, is zero, so you do not move.
Answer:
Catastrophism, gradualism, and uniformitarianism I believe!
A) They hibernate.
Animals like bears often hibernate, which is go into a deep sleep lasting a long period of time, it is a good way to pass through seasonal changes. (hope this helps)
Rabbit ear size tends to decrease as latitude increases. this is an example of a cline
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A cline can be described as a change of the biological trait of a species across its geographical range. A cline can be genetic for example, change in the allele frequency, or phenotypic (change in body size). The change can be shown as continuous gradation, or it can be more abrupt from one geographic region to the next.
My favorite, lysosomes. These break down old cells parts and remove waste. They do this by releasing enzymes that can break down food particles, old cell parts and engulfed bacteria and viruses. Did you know that if the cell knows its health is poor the lysosome will kill the it's own cell.
