Question

Frogs require energy in order to go through the different metamorphic stages found in the diagram below.


Image courtesy of Wikimedia Commons


Where do frogs get the energy required to go through metamorphosis?
A.
from the water they live in
B.
from the food they eat
C.
from the sunlight they absorb
D.
from the air they breathe

Answer 1

B. from the food they eat

Frogs (and tadpoles) obtain the chemical energy needed for growth and metamorphosis by eating. Water and air provide necessary environment and oxygen, and sunlight is not used directly by animals for energy.