Question

select the correct answer from each drop - down menu.
is an element found in all organic molecules. during respiration, animals excrete it as a gas known as

Explanation:

Organic molecules are defined as molecules that contain carbon. During respiration, animals break down glucose (an organic molecule) in the presence of oxygen. The chemical equation for cellular respiration is \(C_6H_{12}O_6+6O_2
ightarrow6CO_2 + 6H_2O+\text{energy}\). Carbon dioxide (\(CO_2\)) is a gas that is excreted as a waste product of this process.

Answer:

Carbon; carbon dioxide.