12 Biology Organisms and Populations - Set No : 14 Question No :10
Question No : 10
 layer is rich in |
| a) | Minerals | b) | Humus |
| c) | Litter | d) | None of these |
Answer No : 10
(b) region is just below the  region in soil, in which
decomposition has begun. Thus, organic matter is found under different stages
of decomposition and microorganisms like bacteria, fungi, Actinomycetes are
frequently found. The decomposed matter is called humus. |