D. Density increases is the correct answer!
Answer : Glucose and oxygen
Explanation : The reactants for photosynthesis are light energy, water, carbon dioxide and chlorophyll, while the products are glucose (sugar), oxygen and water.
But this rule rule is applicable only for double stranded DNA molecule. The possibility of Adenine=40% and Thymine=60% is only in single stranded DNA molecule. In the question, the DNA sample referred is a single stranded DNA. hope it helps :D
<span>The answer to the question "A mutation in yeast makes it unable to convert pyruvate to ethanol. how will this mutation affect these yeast cells" is "a" the mutant yeast will be unable to grow anaerobically.</span>