Answer :
Final answer:
Bacteria are diverse single-celled organisms that can be beneficial or harmful, playing crucial roles in various aspects of life.
Explanation:
Bacteria are single-celled, prokaryotic organisms that lack a nucleus. They can be beneficial, like aiding in food digestion and vitamin synthesis, or harmful, causing diseases like cholera.
- Bacteria are unicellular organisms capable of growth and multiplication.
- They are prokaryotes without a nucleus, reproducing asexually by fission.
- Many bacteria are valued in biotechnology for their contributions to medicine, industry, and agriculture.
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