CBSE Board Class 11 Biology Previous Year Question Papers 2010

PREVIOUS PAPER 2010
CLASS 11
BIOLOGY

1. Name two plants where seeds do not have endosperm? [1]

2. Which plants part has given rise to following modifications:- 
a) Spines of opuntia           b) Pitcher of Nepenthes. [1]

3. Why is leaf of Neem called unipinnately compound. [1]

4. Differentiate between true fruit & false fruit.  [2]

5. Write the floral formula & draw the floral diagram of family Liliaceae. [2]

6. “Underground parts of a plant are not always roots” justify the statement.  [2]

7. How would you differentiate leaflets of a compound leaf from simple leaves
on a branch?[2]

8. What is aestivation? What are its different types give examples. [3]

9. Describe the sub- aerial modifications of stem.  [3]

10. Explain with examples. What are the different modifications of adventitious
roots?[3]

11. Name the tissue represented by jute fibres used for making ropes? [1]

12. Why xylem & phloem are called complex tissues?   [1]

13. Name the types of wood in which vessels are absent. [1]

14. What are the functions of tracheids.  [1]

15. What is stomatal apparatus ? Draw a well labelled diagram of stomata. [2]

16. How can you identify a monocot stem and a dicot stem? Give reasons.  [2]

17. Differentiate between xylem & phloem  [2]

18. Draw a well labeled diagram of T.S. of monocot stem. [2]

19. What is phellogen? What does it produce? [2]

20. Describe the elements of xylem with the help of suitable diagram. [3]

21. Distinguish between dicot root & monocot root.  [3]

22. Which organelle is responsible for increasing the surface area of absorption
in a cell? How?[2]

23. What is mesosome in a prokaryotic cell? Mention  the function that it
performs?[2]

24. “plasma membrane is described as” protein iceberg in sea of lipids”. why ? [2]

25. Mention three similarities & three differences  between mitochondria &
chloroplasts?[3]