UP Board Important Questions for Class 11 Biology

UP Board Important Questions for Class 11 Biology 

The Questions number from 12 to 20 below carries 5 marks each:

Q12. List the characters found in the members of phylum Platyhelminthes.

Q13. We find that Rhizobium forms nodules on the roots of leguminous plants. Also Frankia, another microbe forms nitrogen-fixing nodules on the roots of non-leguminous plant Alnus.

(a) Can we artificially induce the property of nitrogen-fixation in a plant, leguminous or non-leguminous?

(b) What kind of relationship is observed between mycorrhiza and pine trees?

(c) Is it necessary for a microbe to be in close association with a plant to provide mineral nutrition? Explain with the help of an example.

 

Q14. Write a brief note on the endomembrane system.

Q15. Describe various forms of lipid with a few examples.

Q16. Discuss five different types of leaf modifications.

Q17. Explain briefly secondary growth in dicot stem.

Q18. Write detailed notes on the types of muscle tissue.

Q19. What are protozoan protists? Describe the different types of movement seen in this group.

Q20. Allium sativum belongs to which class, family? Describe the floral characters and floral formula of this family.