Question

It is crucial to study ocean microbes because _______. a. they control the major biogeochemical cycles that keep Earth’s biosphere in balance b. they are a significant source of greenhouse gases and pollution c. they are frequently used as food sources in developing nations d. they provide a significant alternative energy source used to replace coal and oil

Answer 1

The correct answer is A. They control the major biogeochemical cycles that keep Earth’s biosphere in balance.

Explanation:

Ocean microbes include organisms such as bacteria, protists or archaea found in the ocean. These organisms are one of the most important factors for life in the ocean and on all the planet. This can be explained as microbes in the ocean clean toxins and wastes that might affect other living organisms, and serve as food for others. This is the case of plankton that is consumed by many fish in the ocean, and it is necessary for many multicellular organisms.

Besides this, microbes regulate multiple biogeochemical cycles that include regulating carbon levels, as well as other substances that are necessary for life such as nutrients, nitrogen or phosphorus. Thus, it is crucial to study ocean microbes because "They control the major biogeochemical cycles that keep Earth’s biosphere in balance".

Answer 2

A is the answer i believe.    ^>^