As a plant grows, its mass increases. The matter that makes up this new mass comes mostly from air and water that the plant changes into compounds such as cellulose using the energy from sunlight.

Question

As an animal grows, its mass increases. The matter that makes up this new mass comes mostly from
A.
food that the animal has eaten and changed into other compounds.
B.
substances that the animal has eaten but cannot digest.
C.
compounds that the animal breaks down into water and carbon dioxide.
D.
air and water that the animal changes into other compounds using the energy from sunlight.

Answer 1

As an animal grows, its mass increases. The matter that makes up this new mass comes mostly from:

A. food that the animal has eaten and changed into other compounds.

Animals obtain energy and mass primarily from the food they consume, which is processed and transformed into various needed compounds through metabolic processes.