Bacteria

Bacteria are single-celled microorganisms that can be found almost everywhere on Earth. They are some of the oldest forms of life on the planet and play a crucial role in various ecosystems and human life.

Characteristics of Bacteria

• Prokaryotic: Bacteria are prokaryotic, meaning they do not have a nucleus or membrane-bound organelles.
• Shapes: Bacteria can have different shapes including spherical (cocci), rod-shaped (bacilli), and spiral (spirilla).
• Reproduction: Bacteria reproduce through binary fission, where a single cell divides into two identical cells.
• Mobility: Some bacteria are motile and can move using flagella or cilia.
• Nutrition: Bacteria can be autotrophic (producing their own food through photosynthesis) or heterotrophic (obtaining nutrients from their environment).

Role of Bacteria

Bacteria play important roles in various ecological processes such as nutrient cycling, decomposition, and symbiotic relationships. They are also used in biotechnology, food production, and medicine.

Study Guide

1. What are the two main types of bacteria based on their shapes?
2. Explain the process of binary fission in bacteria.
3. How do bacteria contribute to nutrient cycling in ecosystems?
4. Give examples of beneficial bacteria used in food production.
5. Discuss the importance of bacteria in human digestive system.

Studying bacteria is essential for understanding the diversity of life and its impact on the environment and human health.

[Bacteria] Related Worksheets and Study Guides:

• Bacteria and VirusesScience • Seventh Grade