Diffusing molecules move until they are through channels of active transport proteins; evenly distributed up their concentration gradients; evenly distributed down their concentration gradients; evenly distributed down their concentration gradients; unevenly distributed up their concentration gradients; unevenly distributed

Answer;

-Down the concentration gradients; evenly distributed

Diffusing molecules move down the concentration gradients until they are evenly distributed.

Explanation;

Diffusion is the movement of particles from an area of higher concentration to an area of lower concentration.

-Whenever a substance exists in greater concentration on one side of a semipermeable membrane, such as cell membranes, any substance that can move down its concentration gradient across the membrane will do so. If the substances can move across the cell membrane without the cell expending energy, the movement of molecules is called passive transport.

-The mechanism of molecules moving across a cell membrane from the side where they are more concentrated to the side where they are less concentrated is a form of passive transport called simple diffusion.

Diffusing molecules move down the concentration gradient until they are evenly distributed.

Explanation:

Diffusion is the process of transport of substances down the concentration gradient in a passive way. During the process, the substances move from the region of higher concentration to the region of lower concentration. The process continues until the substances are equally distributed throughout the given system. The process does not need energy input as the concentration gradient drives it.

the reason the two sea urchins don't compete with each other for food, resources, etc. is because the urchins have adapted to the environment but they have also adapted to each other. this is most likely because the genes of the sea urchins.

answer; i believe its echoic memory,it is believed to last three to four seconds; good luck