for Grade XI students

Sub code 114
HSEB- Grade XI
2066(2009)
Biology
Candidates are required to give their answers in their own words as far as practicable. The figures in the margin indicates full marks.
Full marks 75
Time 3hrs Pass marks 27
Note: this question paper contains Zoology portions in Group ‘A’ and Botany portions in Group ‘B’. So use separate answer books for Group ‘A’ and Group ‘B’

(New course)
Group ‘A’
Zoology
Attempt all questions
Answer in very short (any seven) 7x1=7
(a) What do you understand by taxonomy?
(b) How is biology inter related with other sciences?
(c) Give the zoological name of (i) Jelly fish and (ii) Pigeon
(d) Who [proposed recapitulation theory?
(e) Mention the number of valves in auriculo-ventricular aperture.
(f) What is pellicle?
(g) Name the boring organ of earthworm.
(h) Define adaptation.
(i) Write the full form of IUCN.
(j) What is taxis?

Describe in brief: (any five) 5x3=15
(a) Point out the drawbacks of “Lamarckism”.
(b) List the significances of conjugation in Paramecium.
(c) Describe pre-erythrocytic schizogony of malarial parasites.
(d) How do flatworms and roundworms differ in body cavity, digestive tract and excretory organs?
(e) Draw a well labeled diagram of T.S. of earthworm passing through typhlosole.
(f) Discuss the control measures of water pollution.
(g) Write short notes on fish migration.

Write an essay on “evolution of man”. 8

Five an illustrated account of the excretory system of earthworm. 7.5
Or
Describe the structure of lung of frog. Discuss its working mechanism.

Group ‘B’
Attempt all questions
Answer in short (any seven) 7x1=7
(a) Define adventitious root.
(b) What do you mean by cytokinesis?
(c) What do you understand by binomial nomenclature/
(d) What is incipient nucleus?
(e) What is sporangium?
(f) Mention abiotic factors.
(g) What is lichen?
(h) What is food chain?
(i) What do you mean by micronutirents?
(j) Define aestivation.

Describe in brief (any five) 5x3=15
(a) Differentiate between saturated and unsaturated fatty acids.
(b) Describe the plastids.
(c) Describe the process of crossing over in meiosis.
(d) Describe the structure of Yeast.
(e) Describe the scalariform conjugation in Spirogyra.
(f) Describe the male cone of Pinus.
(g) Differentiate between a prokaryotic and eukaryotic cell.

Describe the life cycle of Dryopteris with alternation of generation. 7.5
Or
Describe the family Cruciferae with necessary diagrams and five the two examples of economic value of this family.

Define ecosystem and discuss the main components of ecosystem. 8







(Old course)
Group ‘A’
Zoology
Attempt all questions
Answer in short: 7x1=7
(a) Define helminthology.
(b) What so you understand by convergent evolution.
(c) Define biogenesis.
(d) What is connecting link?
(e) What is protandrous?
(f) Give an example of a migratory bird.
(g) What do you mean by endangered species?

Describe in brief: 5x3=15
(a) Give the classification of phylum Platyhelminthes with example.
(b) Drew a neatly labeled diagram of Bucco-pharyngeal cavity of male frog. ( no description is required).
(c) Write a note on the economic importance of earthworm.
(d) Mention the effects of water pollution.
(e) Discuss the causes of depletion of wildlife.

Describe the life cycle pf plasmodium in mosquito. 7.5
Or
What is portal system? Describe the hepatic portal system of frog.

Discuss the evolution of man from hominids. 8

Group ‘B’
Botany
Attempt all questions.
Answer in short: 7x1=7
(a) What is the prothallus of fern?
(b) How do the bacteria get their nutrition?
(c) Give two examples of cyanobacteria.
(d) Define alternation of generation.
(e) What is the genetic material of viruses?
(f) What do you understand by primary productivity?
(g) Define trophic level.

Describe in brief: 5x3=15
(a) Different types of RNA and their functions.
(b) Vegetative structure of Spirogyra.
(c) Female cone of Pinus.
(d) Impact of Green house effect on environment.
(e) Meaning and causes of ecological succession.

Describe the characteristic features of family cruciferae with its floral diagram and formula. Give scientific names of any two edible plants of this family. 7.5
Or
Describe the life cycle of Mucor.

Sketch a well labeled diagram of a typical plant cell and describe the structure and function of mitochondria and Nucleus. 8