National Examinations Board (+2)
+2 Science (Class 11 and 12)
Class 11 · NEB 2076 (old course)
Course Title: Biology (Bio)
Full Marks: 75Pass Marks: 27Time: 3 hrs
Candidates are required to give their answers in their own words as far as practicable. The figures in the margin indicate full marks.
- 3.8
Describe the structure and sexual reproduction in Marchantia with suitable diagrams. OR Describe the family cruciferae in semi-technical terms with identifying characters, floral diagram and floral formula with two examples of economic value.
- 4.8
Define ecosystem and describe the structural and functional aspects of pond ecosystem with suitable examples.
- 1.7
Answer in short on any seven. a) What do you understand by apiculture? b) Define genetic engineering. c) What is the first form of life? d) Define taxonomy. e) What is conjugation? f) Define the term haemocoelomate. g) What is haemozoin? h) Give the scientific name of millipede and tiger. i) What is biological control of pest? j) Define the term taxis.
- 2.15
Describe in brief on any five. a) Oparin-Haldane's theory. b) Liver schizogony in malarial parasite. c) Structure and function of trichocyst. d) List out the sources of pollutants. e) Differentiate between chondrichthyes and oesteichthyes. f) Terrestrial adaptations of animal. g) Causes of depletion of wild life.
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