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

a. they control the major biogeochemical cycles that keeps the Earth's biosphere in balance.

It is crucial to study ocean microbes because they control the major biogeochemical cycles that keeps the Earth's biosphere in balance. The dead aquatic plants and animals gets settled at the oceanic bed. The oceanic microbes conducts the process of decomposition over these organisms, so that energy from these organic matter gets circulated in the marine food chain. The organic matter produced after decomposition is buried beneath different sedimentary layers is a rich source of carbon. Some of these layers are superficial and they are carried away by high water currents to the middle and superficial layers of oceanic water body. Therefore, the carbon from oceanic bed is taken away to superficial water layer. This way carbon released out along with evaporated water to the atmosphere. Therefore, microbes control the major biogeochemical cycles that keeps the Earth's biosphere in balance.  

the farther away the object is from the central star (the sun) it's gravitainal pull on the object is weaker when it is farther

explanation:

answer:

the water molecules are transferred from the roots to the stem or top parts of the tall tree because of important properties of water which are adhesion, cohesion and capillary action. cohesion is the property of water molecules keeps water molecules in a combined state by sharing of bonds between them at the atomic level. adhesion allows the interaction of water molecules with other substances or substrate. adhesion will cause the attachment of water molecules to the wall of the vessel (xylem) of the plant. capillary action occurs when the adhesive force to the vessel wall is stronger than the cohesive force between water molecules. capillary action mimics the transfer of water from a tube or pipe. in this way water utilizes its property to transfer water from down to top level of the plant.