The plesiosaur flipper is convergent with other flipper forms becuase even though they don't share the same evolutionary path, in other words, they don't have a common ancestor with flippers, different animals reached to a simmilar structure with the same function that is locomotion in water.
In this form, energy<span>can be </span>stored<span> at one location, then moved from one part of the cell to another, where it can be released to drive other biochemical reactions.</span>
C, because the clown fish is benefiting from the sea anemone while the anemone gains nothing or harmed <span />
"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.