Proteins
u have to know that proteins are synthesized from basic units called amino acids. (think small Lego blocks forming a huge structure)
the process is called condensation.
there are 20 essential amino acids which we require for our daily body use. these amino acids molecular makeup COULD consist of those elements which you mentioned in your question.
hydrogen, carbon, oxygen and nitrogen elements are ALWAYS present in all amino acids. certain types of amino acids consist of phosphorus or even sulfur elements.
Divergence of crustal plates. I could be wrong though and if I am my bad :))
The mesosphere is the coldest layer of the atmosphere.
Hope that helped you.
D)independent
Explanation:
An independent variable is a variable that is changed to test the prediction in an experiment. Independent variables are the cause in an experiment. They are the ones that produces the effect.
- Changing independent variables produces different effects in an experiment.
- These effects are the dependent variables
- Independent variables do not depend on the outcome of the experiment.
- They are the ones that determines how a reaction proceed and what might likely happen.
learn more:
Experiment brainly.com/question/5096428
#learnwithBrainly
The correct answer is They do not have the energy needed to react at normal body temperatures