Which element is found in nucleic acids but not in proteins?

Compare and contrast nutrient limitation in soil vs. nutrient limitation in aquatic ecosystems

Why does it matter if osmosis is put into a “scab” or a “nosebleed? ” where would that leave him?

Which best example best demonstrates the importance of having knowledge of evolutionary relationships? a. illustration of a plant b.organ transplantation between species c. blood donation from a human d. do you need sequence of an insect.