Old Question Paper of Biology
For: Science (Zoology + Botany)
Grade: XI | Year: 2062 (2005)
Sub. Code: 114 ‘D’
Candidates are required to give their answers in their own words as far as practicable. The figures in the margin indicate full marks.
Attempt all the questions.
1. Answer the following questions in short: 7×1=7
a) Define earth crust.
b) Give two functions of RNA.
c) What is Mutation?
d) What is two-kingdom type of classification?
e) What do you mean by Prostia?
f) Differentiate between Centipede and Millipede.
g) What is Protenema?
2. Answer in brief: 8×1=8
a) What is endangered species?
b) Define cell theory.
c) Who is Oparin?
d) What is cholesterol?
e) Which organ takes part in circulation of blood in living beings?
f) Define conjugated protein.
g) Give the scientific name of Spider and Frog.
h) Name the components of nucleotide.
3. Describe in short: 10 × 3 = 30
a) Describe the structure if Eukaryotic cell.
b) Explain the palaeontological evidiences of evolution with examples.
c) Distribution of Pinus in Nepal.
d) Characters of reptiles and fish.
e) Explain Nitrogen cycle with the help of diagram.
f) Give the significances of meiosis.
g) Depletion of ozone layer, a threat to life.
h) What is trophic level? Describe briefly with suitable example.
i) Water pollutants.
j) Migratory behavior of birds
4. Explain the modern theory of evolution and show how a new species is formed according to this concept. 7
5. Describe the life cycle of Marchantia with the help of labeled diagram. 7
6. What is reproduction? Describe the female reproductive organs of frog. 8
OR
Discuss the conjugation process of reproduction in Paramecium.
7. Give the salient features of Gramineae in semi technical terms with its floral diagram, formula and two scientific names of economically important plants of the family. 8
OR
What is an ecosystem? Explain it with reference to a pond.