Question

if an animal is placed into a sealed container for a short time, the oxygen level will
a decrease and the carbon dioxide level will increase.
b decrease and the carbon dioxide level will decrease.
c increase and the carbon dioxide level will increase.
d decrease and the carbon dioxide level will stay the same.
e increase and the carbon dioxide level will decrease.

Explanation:

Step1: Understand animal respiration

Animals respire, taking in oxygen and releasing carbon dioxide.

Step2: Analyze oxygen and carbon dioxide levels in sealed container

In a sealed container, there is no external gas exchange. As the animal uses oxygen for respiration, the oxygen level decreases. At the same time, the carbon dioxide produced by respiration increases.

Answer:

A. decrease and the carbon dioxide level will increase.