Short Answer Type

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A herd of cattle is showing reduced fertility and productivity. Provide one reason and one suggestion to overcome this problem.


The cattle's productivity is decreased due to inbreeding depression. A single outcross i.e. breeding with animals of same breed but should not have common ancestors on either side upto 4-6 generations can restore its fertility.

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Name the type of cross that would help to find the genotype of a pea plant bearing violet flowers.

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Differentiate between the genetic codes given below : (a) Unambiguous and Universal (b) Degenerate and Initiator

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A pollen grain in angiosperm at the time of dehiscence from an anther could be 2-celled or 3-celled. Explain. How are the cells placed within the pollen grain when shed at a 2-celled stage ?

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An electrostatic precipitator in a thermal power plant is not able to generate high voltage of several thousands. Write the ecological implication because of it.

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Mention one application for each of the following : (a) Passive immunization (b) Antihistamine (c) Colostrum (d) Cytokinin-barrier

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What are Cry genes ? In which organism are they present ?

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State two postulates of Oparin and Haldane with reference to origin of life.

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List four benefits to human life by eliminating the use of CFCs .

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Name the microbes that help production of the following products commercially : (a) Statin (b) Citric acid (c) Penicillin (d) Butyric acid

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