Question

Which of the following is an example of a reservoir in the organismic phase of the carbon cycle?
The atmosphere
b. Earth's crust
c. Limestone
d. Plant life

Answer 1

I think the answer is Limestone because Carbon is the chemical backbone of life on Earth. Carbon compounds regulate the Earth’s temperature, make up the food that sustains us, and provide energy that fuels our global economy.

Answer 2

Answer:

D

Explanation:

The question says organismic, the only thing part of that part of the carbon cycle is plant life.

I also took the test and got it right.