Asingle nucleotide of dna is composed of whichof the following substances? a adenine, guanine, and cytosine b hydrogen, a phosphate group, and adenine c ribose sugar, deoxyribose sugar, and thymine d deoxyribose sugar, a phosphate group, and a nitrogenous base

Why do leaves change color in the fall? green pigments break down and no longer mask the color of chlorophyll. chlorophyll breaks down and no longer masks the colors of other pigments. red- and yellow-colored pigments grow and mask green-colored chlorophyll. green-colored chlorophyll breaks down and turns red and yellow.

Which of the following types of reactions would decrease the entropy within a cell? a. dehydration reaction, b. hydrolysis, c. respiration, d. digestion, e. catabolism.

What are positive impacts of algae? how is it used?