Amino acids share a chemical backbone of? Carbon, hydrogen and oxygen
Carbon and hydrogen
Hydrogen and nitrogen
Carbon, hydrogen, nitrogen and oxygen

Which of the following can be reduced by the use of renewable energy sources? a. social costs b. economic costs c. environmental costs d. all of the above select the best answer from the choices provided a b c d

Whats one way that rocks do not follow the typical rock cycle pathway?

What is a group of organisms that are closely related and share similar characteristics