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Home , Floral diagram, Floral formula

Biology Paper I & II

Paper I

1.

(a) What is genome sequence? 1 (b) What do you understand by circinate vernation. 2 (c) Describe the structure of of the stem. 3 (d) How does a new develops through A and B? Discuss. 4

2. A – Riccia; B - Pteris

a) What is liverwort? 1 b) What do you understand by antheridium? 2 c) Describe the internal structural differences between A and B. 3 d) ‘B show clear alternation of generation’ – Explain. 4

3. Dr. Maksud shows a plant to his students in the practical class. He describes it as an non- which grows in cold damp, and shadow place. It starts its life cycle from a heart shaped structure. The plant is also used as vegetable in different part of the country.

a) What is hyphae? 01 b) Write four characteristics of . 02 c) Describe the heart like structure mentioned in the stem. 03 d) ‘The plant of the stem shows clear alternation of generation’ – Explain 04

4. See the diagram below and answer the following question:

a) What is alternation of generation? 1 b) What do you understand by living fossil? 2 c) Compare between the families of fig. A and B. 3 c) “Fig-B has definite alternation of generation” explain with suitable diagram. 4

5.

a) What is ecological pyramid? 1 b) Why do the Cycas called the living fossil? 2 c) Draw and describe the body of the above figure. 3 d) “Alternation of generation is present in the life cycle of the above figure of the stem” – elaborate. 4

6.

a) What is liverwort? 01 b) What do you understand by circinate vernation? 02 c) Draw and describe the gametophytic stage of Q. 03 d) ‘In the above stem Q is more developed than P – Explain. 04

7.

a) What is megasporophyll? 1 (b) Why is Cycas known as living fossil? 2 (c) What is the name of the family of above stem? Write down the of the stem family. 3 (d) Write down the scientific name of four economically important of the family of above stem figure. 4

8.

a) What is living fossil? b) What do you understand by microsporophyll and megasporophyll? c) Draw the with floral formula for Figure X and Y. d) ‘Both the family of Figure X and Y has immense importance’—Elaborate 9. Aditi went to visit to her grandparents at the village. She shows many bamboo plants over there. Her grandfather told her that, it is such a plant, which is needed in many of the purposes. He also mentioned, the other plants of this family are the most important plants for us.

a) What is microsporophyll? b) Why do the Cycas is called coralloid root? c) Write the name and characteristics of the plant mentioned in the stem. d) Analyze the last line of the stem. 10.

a) What is Actinomorphic ? 01 b) What do you understand by perigynous and epigynous flower? 02 c) Describe the floral formula and diagram of the figure of stem. 03 d) The flowering plants which has Q and without Q, has many differences – Explain. 04

11.

a) What is transcription? 1 b) What do you understand by apospory? 2 c) Write the differences between the of the above figure with rice root. 3 d) Explain whether the above figure is of stem or root. 4

12.

a) What is cambium? 1 b) What do you understand by endarch and exarch? 2 c) Write details about figure B. 3 d) ‘In the life of plants the importance of the figure is immense - Explain. 4

13.

a) What is Floral formula? 1 b) What do you understand by hill reaction? 2 c) Explain the internal structure of the figure of above stem. 3 d) Explain the differences between the internal structure of cecer stem with the above mentioned figure. 4

14.

a) What is homologous chromosome? 01 b) What do you understand by transcription and translation? 02 c) In what ways, figure A are different from figure B? 03 d) “On the basis of the position of X and Y the tissues could be of different types” – Analyze. 04

15.

a) What is hydathode? 01 b) What do you understand by stele? 02 c) Draw the cross-section figure of the stem of Q. 03 d) The plants related P and Q has different vascular bundle in their stem and – Explain. 04

Paper II 16.

a) What types of blood circulatory system is found in grasshopper? 1 b) Write down the systemic position of Rohu fish. 2 c) Explain the locomotion of the animal shown in Fig. A. 3 d) ‘Compare the locomotion of the animal shown in Fig. A and B. 4

17. There is a diploblastic animal that has 6-10 flexible, swollen, retractile tentacles encircling the oral pore of the animal. There are also cells present in both the layers of the animal known as interstitial cell. These cells play an important role during development and regeneration. (a)What is coelenteron? (b)What do you understand by epistasis? (c)Describe the way by which the tentacles mentioned in the stem catch prey for the animal. (d)“Interstitial cell mentioned in the stem has immense importance in the reproduction of the animal mentioned in the stem”—discuss.

18.

a) What is a coelomate? 01 b) What do you understand by incomplete dominance? 02 c) Discuss about the cell of the above figure that help in catching prey. 03 d) The cell that involves in catching prey could be of different types in structure as well as function – Explain. 04

19. Abida saw some insects with long antenna and 3 pairs of legs while walking in the garden. They have elongated hind legs and big eyes. They can see in both bright and dim light. (a) What is compound eye? 1 (b) Write the differences between simple eye and compound eye? 2 (c) What is the visual unit of the animal in the stem? Draw a labelled diagram of its longitudinal section. 3 (d) Analyse the last line in the sem. 4

20. Insects occupy a special position in the animal kingdom. They have chitinous endoskeleton, paired appendages, compound eyes and different types of blood circulatory system as well as respiratory system which is very different than human.

a) What is allele? 01 b) What do you understand by testcross and backcross? 02 c) Explain the respiratory system of the insect with figure. 03 d) ‘The insect blood circulatory system would not be possible without the haemocoel’ – Explain. 04

21.Gregor Johan Mendel is known as the father of gentics. He published his laws of genetics following studies on pea plants. But several deviations are found from the result of both Mendals 1st and 2nd law.

(a) What is test cross? 1 (b) What are the problems related to Rh factor? 2 (c) Write the 2nd law of Mendel and explain it by giving an example through a checker board. 3 (d) ‘The result of Mendel’s 2nd law deviated due to the epistatic gene’ – analyze it. 4

22.

a) What is oogenesis? 1 b) What do you understand by master gland? 2 c) Present the result of the stem upto F1 generation through a checker board. 3 d) ‘In F2 generation both white and coloured chicken are found – Why? Discuss. 4

23. Marriage between two deaf and mute people creates many deaf and mute offerings in the 퐹2 generation.

a) What is incomplete metamorphosis? 01 b) What do you understand by tergum? 02 c) Explain the result of 퐹2 generation. 03 d) ‘There are many other reasons that will make the results different in case of dihybrid cross – Explain. 04

↗ 24. O brown coat × O brown coat + 퐹 → 푏푟표푤푛 : 푤ℎ𝑖푡푒 1 (2 : 1)

a) What is moulting? 01 b) How could you differentiate between male and female grasshopper? 02 c) Explain the cause of the formation of the ratio of the stem. 03 d) The result of 퐹1 gen. that exhibited in the stem is not Mendelian – Give logic. 04

25.

fertilized egg

complete embrgoyeny grasshopper

nymph

a) Write the scientific name of grass hopper. 01 b) What do you understand by budding? 02 c) Write detail about the structure of the circulatory system of the animal in the stem. 03 d) ‘Transformation of grasshopper in the above flowchart is complete’ – Give logic in favour of you answer. 04

26. Insects occupy a special position in animal kingdom. It has many special features. The blood and it’s circulation is also very different than human. a) What is nymph? 1 b) What do you understand by ctenedia? 2 c) Explain the blood circulation system of the above mentioned insect. 3 d) Compare the blood circulation system of human and the above mentioned insect. 4