Question

Humus accumulates in the tundra region beaucse:

• A. There are no fires
• B. Low temperature inhibit decay by organisms
• C. There are no earthworms
• D. The conditions are arid

Answer 1

The correct option is B

Low temperature inhibit decay by organisms

Humus is formed by decay of the organic matter such as dead leaves, plants and animals. However, in low temperatures the rate of decay of organic matter is very slow and hence in tundra region the humus accumulates without decay.