How does the endocrine system affect the excretory system? apex?

One statements is an example of a scientific observation. another statement is an example of a scientific explanation. identify the correct statement for each category to illustrate how scientific explanations are inferred from scientific observations.

Which element is found in both dna and proteins

Which process in respiration happens first? a)pyruvate processing b)electron transport chain c)krebs cycle d)glycolysis