Question

Microbes are an important part of the environment because they

• A. break down waste products
• B. cause the water cycle
• C. protect the ozone layer
• D. block global warming

Answer 1

The correct option is A

break down waste products

The correct option is (A):
Explanation for the correct option:

1. Microbes are the organisms which are not visible by naked eyes and can only be visualized under electron microscope.
2. Existence of microbes is diverse and therefore can be found everywhere from hot springs to the coldest glaciers.
3. These are also found in the houses, food materials and in the living beings.
4. Major groups of microbes are bacteria, algae, protozoan, and fungi.
5. Some of them are infectious and cause disease while others are beneficial.
6. Some bacteria, such as Rhizobium and blue green algae, can fix nitrogen from the air and aid in soil fertility improvement.
7. Some microorganisms assist clean up the environment by degrading organic waste and dead plants and animals into simple substances.

Final answer: Microbes are an important part of the environment because they break down waste products.