Are you searching for the AHSEC Class 12 Biology Question Paper 2013? Look no further! This article provides a detailed analysis and HS 2nd Year Biology Question Paper 2013 under the Assam Higher Secondary Education Council (AHSEC) Now Assam State School Education Board (ASSEB). Assam Board Class 12 Biology Previous Year Question Paper For students preparing for board exams, previous year question papers are a crucial resource for understanding question patterns, marks distribution, and important topics.
2013
BIOLOGY (Theory)
Full Marks: 70
Time: Three hours
The figures in the margin indicate full marks for the questions
1. Fungal association with roots of higher plants is called _______.
2. Write true or false:
(a) Apomixis is a phenomenon in which ovary develops into a fruit without fertilization.
(b) Aquatic fern 'Marsilea' is an excellent biofertilizer.
3. What is 'hidden hunger'?
4. 'Archaeopteryx' is considered a connecting link between reptiles and birds – Explain.
5. An orchid plant is growing on the branch of a mango tree. How do you describe this interaction between them?
6. How is DNA isolated in purified form from a bacterial cell?
7. Write the scientific names and their utility of the following plants (any two):
(a) Neem (Azadirachta indica)
(b) Cinchona (Cinchona officinalis)
(c) Teak (Tectona grandis)
8. Give the classification of biofertilizers with one example from each group.
9. Discuss the Modern Synthetic Theory of evolution.
10. What do you mean by speciation? Name different forms of speciation.
11. What is sewage? In which way sewage can be treated?
12. Explain any three methods to force recombinant DNA into a host cell.
What do you mean by GEAC? What are its roles?
13. Describe the stages of embryo sac formation in angiosperms with a suitable diagram.
14. What are molecular scissors? Explain their role in recombinant DNA technology.
Part-II (ZOOLOGY)
1. Fill in the blank: (any two)
(a) Kaseeru is______food plant of eri silkworm.
(b) Filariasis is caused by_______worm.
(c) Acrosome of sperm is formed from the________.
(d) Phenylketonuria causes________.
2. Answer any two:
(a) What is a transgenic animal?
(b) Express the genotype of AB blood group.
(c) Why should motor vehicles fitted with catalytic converters use unleaded petrol?
(d) Write the equation of species-area relationships in a logarithmic scale.
3. Write answers of any four of the following:
(a) How is placenta formed?
(b) Why does Cu-T act as an effective contraceptive?
(c) Explain the chromosomal theory of inheritance.
(d) What are the four features of genetic material?
(e) State the symptoms of typhoid.
(f) Write the names of two primary and two secondary host plants of muga silkworm.
4. State the difference between (any two)
(a) Passive immunity and active immunity.
(b) Down's syndrome and Turner's syndrome.
(c) Primary succession and secondary succession.
(d) Follicular phase and Luteal phase of Menstrual cycle.
5. Draw a neat labeled diagram of sperm.
6. What is co-dominance? Explain with example.
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Also Explore: AHSEC HS Class 12 Biology Chapter Wise Notes For Upcoming Final Examination
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