Give two main sources of carbon.

What are the main sources of carbon ?

A. Give examples of two autotrophs and two heterotrohs B. Define essential elements. C. Name the main sources of carbon and hydrogen to the plants. D. Give two examples of deficiency diseases.

Name the main sources of carbon monoxide pollution.

Give two main functions of carbohydrates in plants.

Give two main functions of carbohydrates in plants.

What is the main source of carbon monoxide in the atmosphere ?

Name two main sources of nuclear radiations. How are the nuclear radiations harmful ?