Which of the following is the building block of all proteins? Question 2 options:

Amino acids

5 Carbon sugars

Phosphate groups

Nitrogen bases

When the body has a weakened immune system, the production of antibodies is increased.

The gulf stream and north atlantic current modify the climate of northwestern europe by making the climatea) warmer and drierb) warmer and more humidc) cooler and drierd) cooler and more humid

Scientific research about the nitrogen cycle and water quality is mostvaluable to human populations with: afew sources of electricity.b. few sources of fresh water.c. large coastal populations.d. large amounts of farmland.