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Biology | KA Board | Grade 12 | 2014
Q. Introduction of some alien species causes biodiversity loss. Justify the statement with an example.
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Q. Define polymerase chain reaction.
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Q. Define Mortality.
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Q. Distinguish between homogametes and heterogametes.
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Q. What is test cross? Mention its significance.
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Q. List the period, brain capacity and probable food of Homo erectus stage of human evolution.
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Q. What is global warming?
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Q. Plant cells are totipotent. Why?
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Q. Mention the different steps of process of recombinant DNA technology.
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Q. Draw a neat labelled diagram of stirred tank bioreactor.
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Q. a) Draw an ideal pyramid of energy and mention the units.
b) What is an ecological succession?
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Q. Briefly explain any three prevention and control measures of drug\alcohol abuse.
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Q. a) Discuss the MOET technique of animal breeding.
b) Differentiate between inbreeding and outbreeding.
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Q. a) What is Medical Termination of Pregnancy? Mention the safe period for Medical Termination of Pregnancy.
b) Write three simple principles to prevent sexually transmitted diseases.
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Q. Mention the causes and effects phenylketonuria.
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Q. Draw a neat labelled diagram of human sperm.
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Q. Mention the steps involved in DNA fingerprinting.
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Q. a) Distinguish between primary productivity and secondary productivity of an ecosystem.
b) Define food web.
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Q. What is an allergy?
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Q. a) What are hermophrodites? Mention one example.
b) Offsprings of asexual reproduction are called clones. Why?
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Q. Differentiate between active immunity and passive immunity.
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Q. Name the causative agent of Elephantiasis.
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Q. Mention the bacterium responsible for the large holes seen in 'Swiss Cheese'.
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Q. What is gene pool?
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Q. What are sacred groves? Mention any two examples.
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Q. Describe the outbreeding devices that prevent the autogamy.
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Q. Name the cells that secrete androgens.
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Q. What are homologous organs? Mention any two examples.
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Q. List the salient features of human genome project.
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