Which of the following explain why elements such as carbon that make up organic molecules are not permanently removed from the environment?
Pun intended — It's the carbon cycle
a
They are replaced by volcanic eruptions.
b
They are cycled through ecosystems.
c
They are constantly produced from soil nutients.
d
They are replenished by sunlight.
1 answer
b. They are cycled through ecosystems.
1 answer