Draw and explain carbon cycle innature.

Briefly explain carbon cycle in nature.

Explain urea cycle.

Explain carbon cycle in nature with suitable flow chart.

State the function of a reservior in a nutrient cycle. Explain the simplified model of carbon cycle in nature.

Given below is a figure of carbon cycle in nature. Write sources of carbon marked A.

Explain the carbon cycle in ecosystem?

What are biochemical cycles? Explain the oxygen cycle in nature with graphic representation.

Briefly explain cardiac cycle.