What is a nucleotide? O A matched pair of amino acids
O A building block of the nucleus
O A single "letter" of DNA
An entire strand of DNA

Ausable water source is one that can be used by humans for drinking or agriculture. identify the water reservoirs as usable or unusable based on their current state. oceans rivers glaciers freshwater lakes groundwater

Glucose is broken down in different ways, both in the presence and in the absence of oxygen. using the table for reference, what major products are formed in each reaction set?

About __ of the mass of the cell is water