Which of the following soil properties is not influenced by microorganism activity? a. soil acidity b. amount of organic matter c. nutrient levels d. none of the above

The correct answer would be d. none of the above.

Microorganisms play essential role in maintaining the fertility of the soil. They help in maintaining the pH of the soil, amount of organic matter and nutrients in the soil.

They help in proper cycling of the nutrients in an ecosystem. They help in decomposing the dead plants and animals which increases the organic matter as well as nutrients in the soil.

In addition, there are many nitrogen-fixing bacteria present in the soil which fix the atmospheric nitrogen into the compounds that can be used by the plants.

answer:   option a) glucagon was secreted by his pancreas before he ate the cookies because blood glucose was low. insulin was secreted after he ate the cookies because his blood glucose was high.

explanation: