Question

A scientist placed a sample of yeast, a heterotrophic single-celled eukaryote, in a closed test tube containing a solution of glucose. How will the composition of the air in the test tube change as the yeast interacts with the glucose?

A. The oxygen level will increase.
B. The carbon dioxide level will decrease.
C. The carbon dioxide level will increase.
D. The level of carbon dioxide and oxygen will remain the same.

Answer 1

C. The carbon dioxide level will increase.

Step-by-step explanation:

The yeast will ferment the glucose to produce energy and the waste product of this process is carbon dioxide. Therefore, the level of carbon dioxide in the test tube will increase, while the level of oxygen will remain the same.