Question

Major source of mineral in soil is the (a) parent rock from which soil is formed (b) plants (c) animals (d) bacteria

• A. Parent rock from which soil is formed
• B. Plants
• C. Animals
• D. Bacteria

Answer 1

The correct option is A

Parent rock from which soil is formed

Explanation for correct answer

(A) Parent rock from which soil is formed.

1. The lichens growing on the rocks release certain chemicals that break down the rock to a fine powder and form a thin layer of soil.
2. The mineral nutrients present in the soil are determined by the rock it was formed from.
3. Hence option (A) is correct.

Explanation for incorrect answer

(B) Plants

1. Plants are major source of food not minerals for all the organisms on the earth.
2. Hence option (B) is incorrect.

(C) Animals

1. Animals is the main source of protein and include fish, meat, poultry and cheese which is important for humans.
2. Hence option (C) is incorrect.

(D) Bacteria

1. Bacteria inhabit soil, water, acidic hot springs radioactive waste and the deep biosphere of earth's crust.
2. Hence option (D) is incorrect.

Therefore, minerals are major source of rock from which soil is formed. Hence, option (A) is correct.