The cell membrane a. controls which substances enter and exit the cell. b. alters and packages proteins and lipids. c. is the site of most cellular chemical reactions. d. converts glucose to other energy molecules.

your answer would be A have a nice day!

The answer is A. controls which substances enter and exit the cell.

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the answer is; comparing the frequency of collisions with and without the device

this makes the anti-collision system an independent variable and the collisions a dependent variable. if there are fewer collisions with an anti-collision system that without, then it can be stated that the system is a success. essentially, collisions under an anti-collision system are compared with the frequency of collisions by cars with the human drivers.

producers: apple trees, potatoes, carrots, grains, acorns, cabbage, grass, corn, lettuce

consumers: deer, mice, rabbits, chickens, squirrels, horses, worms, cows

predators: eagles, frogs, wolves, owls