Biology - Our Environment
Revision Assignment
ONE MARK QUESTIONS
1. Using Kulhads as disposable cups to serve tea in trains, proved to be a bad idea. Why?
2. Why is plastic not degraded by bacteria?
TWO MARK QUESTIONS
3. DDT has entered the food chain. Which food habit is safer- vegetarian or non-vegetarian?
4. Classify the flowing as decomposers and producers Green plants, bacteria, fungi, algae, blue-green algae.
5. Distinguish between producers and consumers.
6. Name two environment-friendly practices.
7. Write any two ways of energy flow through an ecosystem.