What are protein types and function?

The two common types of proteins are enzymes and hormones.

Enzymes are produced by living cells. Their purpose is to help with things like digestion. They serve as catalysts in biochemical reactions.

Hormones are messengers, telling different parts of your body what to do.

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.

because they are eaten by the frog and the frog getseaten by the snake and the snake by the eagle