HISSAN Question Paper 2071 (2015) – Biology Grade XI

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ParameciumHISSAN Central Examination
Old Question Paper of Biology (Botany + Zoology)
For: Science Class 11 | Biology (114-D1)
Year: 2071 (2015)

Time: 3 Hrs | Full Marks: 75 | Pass Marks: 27
Candidates are required to give their answer in their own words as far as practicable. The figures in the margin indicate full marks.

Note: This question paper contains Botany portion in Group ‘A’ and Zoology portion in Group ‘B’. So use separate sheets for Group ‘A’ and Group ‘B’. First use answer sheet for Group ‘A’.

Group ‘A’ (Botany) – Attempt All the questions.
1. Answer in very short (any seven): [7 X 1 = 7]

a) What is lysosome?
b) Define synecology.
c) What is cymose inflorescence?
d) Define metacentric chromosome.
e) What is the function of heterocyst?
f) Write the scientific name of Yeast.
g) Define chaismata.
h) Name the main components of secondary cell wall.
i) Define the term community.
j) What is proto-cooperation?

2. Describe in brief (any five): [5 X 3 = 15]

a) Elaborate metaphase I of meiosis.
b) The structure and function of mitochondria.
c) Well labeled diagram of L.S. of Moss capsule (Description not required).
d) The structure of DNA molecule.
e) Economic importance of Fungi.
f) The Nitrogen cycle in nature.
g) Different types of food chains in ecosystem.
h) Scalariform conjugation in Spirogyra.

3. What is alternation of generation? Explain it with reference to the life cycle of Fern. [7.5]
OR
Describe the family Compositae in semi-technical terms with its floral formula and floral diagrams, and also mention nay two plants of economic importance of this family.
4. What is succession? Write difference steps involved in the process of succession in detail with suitable examples. [8]

Group “B” (Zoology) – Attempt all the questions.
1. Answer in very short (any seven) : [7 X 1 = 7]

a) Define the term herpetology.
b) State biogenetic law.
c) Mention the source of energy in Miller Urey’s experiment.
d) What do you mean by speciation?
e) Write the significance of typhlose.
f) Give the scientific names of liver fluke and pigeon.
g) Give two examples of endangered faunal species in Nepal.
h) Expand the term BOD.
i) What do you mean by smog?

2. Describe in brief (any five): [5 X 3 = 15]

a) Differences between old world monkeys and new world monkeys.
b) Structure of Paramecium.
c) Process of copulation in earthworm.
d) General characters of arthropoda.
e) Structure and functions of pancreas of frog.
f) Adaptational features of arboreal animals.
g) Fish migration.

3. What are fossils? Discuss the types of fossils. Explain how fossils records provide evidence in support of organic evolution. [8]
4. Elaborate the life cycle of Plasmodium vivax in female Anopheles mosquito. [7.5]
Or
What is portal system? Describe it with reference to frog.

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