CBSE/NCERT/Exercises/Class_12_Biology
Created by Titas Mallick
Biology Teacher • M.Sc. Botany • B.Ed. • CTET (CBSE) • CISCE Examiner
BioNotesBioNotesCreated by Titas Mallick
Biology Teacher • M.Sc. Botany • B.Ed. • CTET (CBSE) • CISCE Examiner
Online
Questions and Answers for Chapter 12
1. Fill in the blanks.
2. Which one of the following has the largest population in a food chain?
3. The second trophic level in a lake is
4. Secondary producers are
5. What is the percentage of photosynthetically active radiation (PAR) in the incident solar radiation?
6. Distinguish between:
7. Describe the components of an ecosystem.
8. Define ecological pyramids and describe with examples, pyramids of number and biomass.
9. What is primary productivity? Give brief description of factors that affect primary productivity.
10. Define decomposition and describe the processes and products of decomposition.
11. Give an account of energy flow in an ecosystem.