Q.No.3. Describe the structure and working mechanism of the heart of frog. [8]
OR
Describe the structure of digestive organ of Pheretima.
Q.No.4.Write an account of human evolution starting from Ramapethicus . [7.5]

Section B Botany
Q.No.1.Give answer in very brief (any seven). [1X7]
1.1. What is syngenesious stamen .
1.2. In which case there is inverted ecological pyramid present ?
1.3. What is coenocytic mycelium?
1.4. Give the full form of ADP and AMP
1.5.What are leucoplast?Mention their function
1.6. Write the function of heterosyst in Nostoc
1.7. Define crossing over.
1.8. What is flower?
1.9. What is cone?
1.10 Give any two functions of Golgi body.
Q.No.2. Give the short answer of the following. .(any five) 5x3=15
2.1. Name the different biotic components of the pond ecosystem
2.2 What are the economical nature of Bacteria
2.3. Describe the structure and function of chloroplast.
2.4. Discuss the consequence of ozone layer depletion .
2.5. Draw well labeled diagram of cynobacterical cell. No description required.
2.6. What is placentation? Mention their types with example.
2.7. Write the short comings of two kingdom system of classification.

Q.No.3. Write the distinguishing character of family Cruciferae with floral diagram and formula. Give the botanical names of any three economically plants . [8]
OR
Define alternaion of generation .Discuss it with reference to diagrammatic life cycle of Funaria 1+3+4
Q.No.4. Define food chain .Discuss it with reference of pond system . [7.5]

MODEL QUESTI0N FOR CLASS XI 2066
Set II
Sub - Biology Full marks 75
Time 3 hours Pass mark 27
Section A Zoology
Q.No.1.Give answer in very brief(any seven) . 1X7=7
1.1 What was the kind of atmosphere in the primitive earth?
1.2 Who coined the term Biology?
1.3. Who used the phrase " survival of the fittest" for the first time?
1.4. What is the function of omentum?
1.5. Name the theory given by Hugo de Vries.
1.6.Why protoplasmic bridge are formed in Paracemium?
1.7. What are the characters for the fossorial adaptation?
1.8. What is the function of typhlosole in earthworm?
1.9. In which group of animal, do you find the stinging cells?
1.10. Who propounded the new theory regarding the flow of blood in the heart?
Q.No.2. Give the short answer of the following. .(any five) 3x5=15
2.1. Write short note on erythrocytic schizogony.
2.2. Give the general characters and classification of Arthropoda.
2.3. What are the causes of extinction of wildlife in Nepal.
2.4.Discuss protein as biomolecule.
2.5 Describe the asexual reproduction in Paramecium
2.6. Describe the spontaneous generation theory.
2.7. Discuss the old theory regarding the flow of blood in forg.
Q.No.3. Give a brief account of human evolution. [8]
Q.No.4. Discuss the physiology of digestion in frog. 7.5 Or
Describe reproductive system of earthworm.
Section B Botany
Q.No.1.Give answer in very brief (any seven). [1X7]
1.1. Define cellular totipotency.
1.2. Why is mitochondrion called the power house of cell?
1.3 Write down the functions of chloroplast.
1.4 Why are the nucleic acids are important for life?
1.5. What do you mean by scalariform conjugation?
1.6 Give one difference between corolloid root and mycorrhizal root
1.7. What is leaf?
1.8. What is the role of producers in Ecosystem?
1.9. Why is Spirogyra called water silk?
1.10 Give any two important characters of Kingdom Monera
Q.No.2. Give the short answer of the following.(any five). 5x3=15
2.1. Draw well labled diagram of cynobacterical cell. No description required.
2.2. Discuss the roles of edaphic factors in the ecosystem
2.3 Explain the characters of plant community.
2.4 Discuss protein as biomolecule.
2.5 Give an out line classification of 5 kingdom system. Mention its advantages and
disadvantages.
2.6 Briefly describe the economic importance of Bacteria
2.7. What do you mean by the following terms? A) Epipetalous B) Cruciform corolla C) Didelphous stamens
Q.No.3. . Give the salient features of Solanacae in semitechnical terms with its floral formula, diagram and two scientific names of economically important plants of this family. 8 Or
What is pollution ? Describe water pollution, their effect and control measures

Q.No.4. Describe the sexual reproduction in Mucor [7.5]

MODEL QUESTI0N FOR CLASS XI 2066
Sub - Biology set III Full marks 75
Time 3 hours Pass mark 27
Section A Zoology
Q.No.1.Give answer in very brief(any seven) . 1X7=7
1.1 What is incubation period?
1.2 What is the function of seminal vesicle in earthworm?
1.3 Write down the two endangered species of animals with scientific names
1.4 What is the gist of Lamarckism?
1.5 What do you mean by cyclosis in Paramecium?
1.6 What do the homologous organs show?
1.7 What do you understand by convergent evolution?
1.8.What is the function of fat bodies in reproduction?
1.9. What is physiology and cytology?
1.10. Why are the Protozoans immortal?

Q.No.2. Give the short answer of the following. .(any five) 3x5=15
2.1 Write down the conservation strategies of wild life.
2.2 Illustrate the functions of liver.
2.3. Why Archaeopteryx is regarded as connecting link?
2.4 Discuss the new theory regarding the flow of blood from auricles to ventricle in frog.
2.5 Describe the Urey Miller experiment with diagram.
2.6. Describe the cocoon formation in earthworm.
2.7. Describe the Erythrocytic cycle of Plasmodium.
Q.No.3.. Discuss the Theory of Natural Selection with its draw backs 8
OR
What is conjugation? Describe the process of conjugation in Paramecium. 7.5

Q.No.4.Describe the Amphibian Heart with suitable diagram.
Section B Botany
Q.No.1.Give answer in very brief(any seven) . [1X7]
1.1. Name the colouring pigment of red algae.
1.2 What is symbiosis? Give examples.
1.3 What are the bioindicators of air pollution?
1.4 Write down the names of subunits of prokaryotic ribosomes.
1.5 Write one major character of metaphase of mitosis.
1.6. Name two species of Pinus found in Nepal.
1.7. Give two importances of Cyanobaceteria.
1.8. What is phylotaxy?
1.9. Give the classification of Cycas.
1.10 Who gave the concept of totipotency and cell theory?
Q.No.2. Give the short answer of the following. .(any five) 5x3=15
2.1. Name the different biotic components of the pond ecosystem
2.2 What are the economical nature of Bacteria
2.3. Describe the structure and function of mitochondria.
2.4. Differentiate between primary and secondary succession.
2.5. Describe the impacts of deforestation.
2.6. What is aestivation? Discuss their types.
2.7 Describe cell structure of Spirogyra with well labeled diagram.
Q.No.3. What is Describe cell structure of Spirogyra with well labeled diagram.
biogeochemical cycle? Mention its types, also explain Nitrogen cycle in nature. 8 Or
Describe Papilionaceae or in semitechnical terms with it floral formula & floral diagram. Write any four economically important plant ofthis family with scientific names.
Q.No.4. What is alternation of generation? Describe it with reference of Fern. 7.5

MODEL QUESTI0N FOR CLASS XI 2066
Sub - Biology set IV Full marks 75
Time 3 hours Pass mark 27
Section A Zoology
Q.No.1.Give answer in very brief (any seven). 1X7=7
1.1.What is Anatomy?
1.2Write two important characteristic features of Phylum Echinodermata.
1.3What is the function of mesorchium?
1.4.Write the zoological names of Prawn and Spider.
1.5What is typhlosole? Mention its function.
1.6Write down the name of aminoacids found at the end of Miller and Urey's experiment.
1.7What is the immediate ancestor of modern man
1.8. What is the method of asextual method in Paramecium?
1.9. What is she homodont?
1.10. At what time, Ramapethicus survived on the earth?

Q.no.2. Give the short answer of the following. .(any five) 5x3=15
2.1Give brief account of Reflex Action.
2.2Justify " Earthworms are the friend of farmers".
2.3Write a short note on Oparin and Haldane's theory on Origin of life.
2.4Write down the causes of depletion of wild life.
2.5Give out line classification of Coelenterata with examples
2.6. Differentiate between Ape and Man
2.7. Describe the structure of tooth of frog.
Q.No.3.Describe the Theory of Natural Selection with its draw backs. 8
Q.No.4. Discuss the asexual life cycle of Plasmodium in man with well labeled diagram
Or
Describe the male reproductive system of Frog with labeled diagram. 7.5

Section B Botany

Q.No.1.Give answer in very brief(any seven) . [1X7]
1.1Why is deuteromycetes called fungi imperfecti?
1.2 Give the common names of Spirogyra and Funaria.
1.3What are the roles of decomposers in ecosystem?
1.4What are vascular cryptogams?
1.5. Define cell division.
1.6How are red algae able to survive and lead a successful life in deep sea?
1.7Name the pigments that are present in photoautotrophic bacteria
1.8. What do you mean by sporophyll?
1.9. Give any two xerophytic characters of Gymnoperm.
1.10.Give one difference between actinomorphic and zygomorphic flower.
Q.No.2. Give the short answer of the following.(any five). 5x3=15
2.1 Why are the viruses called Biological puzzles?
2.2.Differentiate between mitosis and meiosis cell division.
2.3.Explain haplo diplobiontic type of life cycle of yeast.
2.4.Draw a well labeled diagram of LS of capsule of Funaria.
2.5.Protein is one of the important biomolecule. Justify this statement
2.6. What is acid rain? Give its consequences.
2.7. Draw the phyllogenetic and evolutionary line of five kingdom system of classification.

Q.No.3.Describe the family Poaceae in semi technical terms with their floral diagram and floral formula . write any two plants belonging to this family with economic importance 8 Or
Describe the diagrammatic life cycle of Marchantia
Q.No.4. Describe the pond as an example of aquatic ecosystem with suitable diagram 7.5

MODEL QUESTI0N FOR CLASS XI 2066
Sub - Biology Set V Full marks 75
Time 3 hours Pass mark 27
Section A Zoology
Q.No.1.Give answer in very brief (any seven). 1X7=7
1.1. What is metamerical segmentation?
1.2. Give the meaning of plasmogamy and karyogamy
1.3. What is cyclosis?
1.4. What is physiology?
1.5. What is serological test carried out for?
1.6. Define the organic evolution and connecting link.
1.7. Classify Paramecium in scientific position.
1.8. Which artery supplies blood to the brain in frog?
1.9. What is the function of gizzard in earthaworm?
1.10. What is rare animal? Give example.
Q.No.2. Give the short answer of the following. .(any five) 5x3=15
2.1. Describe the Oparin and Haldane theory of origin of life on earth.
2.2. Draw a well labeled diagram of Frog.
2.3 Define endangered and vulnerable species and give the scientific name of any four endangered mammals of Nepal.
2.4. Discuss how the fossils give the evidences of organic evolution.
2.5. Earthworms are fiends of farmers. Justify.
2.6. Differentiate between cartilaginous and bony fishes.
2.7. Write down the characters of Phylum Mollusca.

Q.No.3. What is conjugation? Describe the process of conjugation in Paramecium 7.5
Or
What is portal system? Describe it with reference to frog.
Q.No.4.What is organic evolution? Trace out evolution of man starting from Ramapethicus. 8

Section B Botany

Q.No.1.Give answer in very brief (any seven). [1X7]
1.1. Lysosome is also called suicidal bag of cell, why?
1.2. Where is arghegonium formed in Funaria?
1.3. Give chief function of Ribosome.
1.4. Write two important character of Monera.
1.5. Mention one important difference between red and brown algae.
1.6. Write the function of heterocyst in nostoc.
1.7. Give the characteristic feature of Anaphase and Telophase of Mitosis.
1.8. What is leaf?
1.9. Give one difference between microsporophyll and megasporophyll
1.10. Which chemical give the rigidity to the cell wall.
Q.No.2. Give the short answer of the following.(any five) 5x3=15
2.1. Describe the asexual reproduction in Mucor.
2.2 Explain microgametogenesis.
2.3 Descrithe the structure and function of chloroplast.
2.4. Draw and describe the gametophyte of fern in short.
2.5. What is the modern trend in Taxonomy?
2.6. Write notes on medicinal and agricultural values of Bacteria.
2.7. Describe the different types of phylotaxy
Q.No.3.Describe the mitotic cell division 7.5
Q.No.4. Describe the life cycle of Spirogyra. 8 Or
Describe the family Solanaceae in semi technical terms with their floral diagram and floral formula . Write any two plants belonging to this family with economic importance