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Bacteria occur-...

Bacteria occur-

A

In water only

B

In soil only

C

As parasite

D

Everywhere

Text Solution

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The correct Answer is:
**Step-by-Step Text Solution:** 1. **Definition of Bacteria**: Bacteria are single-celled prokaryotic microorganisms. They are among the simplest and most abundant forms of life on Earth. 2. **Habitat of Bacteria**: Bacteria can be found in a wide variety of environments. They occur in: - **Soil**: Bacteria play a crucial role in nutrient cycling and organic matter decomposition. - **Water**: They inhabit freshwater, saltwater, and even extreme aquatic environments like hot springs. - **Air**: Bacteria can be present in the atmosphere, often carried by wind. - **Living Organisms**: Many bacteria live in symbiotic relationships with plants and animals, including humans, where they can be beneficial or pathogenic. 3. **Adaptability**: Bacteria are highly adaptable and can thrive in extreme conditions, such as high temperatures, high salinity, and acidic or alkaline environments. This adaptability allows them to colonize diverse habitats. 4. **Importance of Bacteria**: Bacteria are essential for various ecological processes, including decomposition, nitrogen fixation, and as a part of the human microbiome, which aids in digestion and protects against pathogens. 5. **Conclusion**: Bacteria occur in almost every environment on Earth, showcasing their versatility and importance in ecosystems and human health. ---
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