The correct answer is…
(b) Microorganisms.
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Explanation:
When a soil solution obtained from moist soil is observed under a microscope, one of the most prominent features you would see is microorganisms. This is because soil is a complex ecosystem teeming with microscopic life. These microorganisms include bacteria, fungi, protozoa, nematodes, and various other microscopic creatures that play crucial roles in soil health and nutrient cycling.
The soil solution is the liquid phase of the soil, consisting of water with dissolved minerals and organic compounds. When this solution is extracted and viewed under a microscope, the water itself (option c) would not be visible as it’s the medium in which everything else is suspended. Soil particles (option a) and sand (option d), being larger components, are typically filtered out when extracting the soil solution. Even if some very fine particles remained, they would not be the primary focus when examining soil biology.
Microorganisms, on the other hand, are abundant in the soil solution and are of great interest to soil scientists and ecologists. These tiny organisms are responsible for breaking down organic matter, fixing nitrogen, forming symbiotic relationships with plant roots, and contributing to overall soil fertility. Their presence and activity in the soil solution are indicators of soil health and biological activity. Therefore, when examining a soil solution under a microscope, it’s the microorganisms that would be the most significant and informative component to observe.
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