Which is a basic unit of a sugar molecule? monosaccharide nucleotide fatty acid amino acid

This aquarium exhibits biotic and abiotic factors in an aquatic environment. one of the abiotic factors is

An ecologist studied the same species of deer during the summer and the winter. she noticed that during the summer, when there was plenty of food, the deer were energetic and playful. however, during winter when food was scarce, the deer moved more slowly and did not run unless they needed to escape a predator. which scientific fact is best supported by her observations?

What substance acts to prevent sudden ph changes in bodily fluids?