Question

Give a reason for the following: Bacteria are both harmful and useful.

Answer 1

Bacteria:

1. Bacteria belong to the kingdom monera.
2. Bacteria are microscopic.
3. Bacteria are unicellular, prokaryotes with ill-defined nuclei and cell organelles without a membrane.
4. Bacteria can be autotrophic and can be heterotrophic.
5. Bacteria are both harmful (parasites) and useful.

Harmful bacteria:

1. They can cause deadly bacterial diseases such as typhoid, tuberculosis, cholera, etc.
2. Bacteria can damage the quality of clothes, leather, and books.
3. Bacterial cultivation of food will lead to the spoiling of the food.

Beneficial bacteria:

1. Bacteria helps in setting up the curd.
2. In the preparation of antibiotics.
3. In decomposition of waste.