| Biology (Theory) |
| Time allowed : 3 hours | Maximum Marks : 70 |
General
Instructions :
|
SECTION - A
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What is the importance of the epiglottis in human body ?
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What happens to the glycogen concentration in the liver cells when the level of adrenaline increases in the blood stream of humans ?
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Mention the scientific term used for modified form of reproduction in which seeds are formed without fusion of gametes.
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What does ecological niche of an organism represent ?
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It was diagnosed by a specialist that the immune system of the body of a patient has been suppressed. Name the disease the patient has been suffering from and its causative agent.
SECTION - B
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Where are casparian strips located in a plant body and what are they made up of ? Mention its function.
OR
What is respiration quotient (RQ) ? Under what conditions will the value of RQ be 1 ? Explain.
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What is resting membrane potential of a neuron ? What is the role of sodium potassium pumps in maintaining it ?
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Draw a diagram of external view of a human brain. Label the frontal lobe, temporal lobe, occipital lobe and cerebellum.
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How is the milk production regulated by hormones in human female ? Explain.
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Explain the significance of the auxin / cytokinin ratio in plant tissue culture.
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What does S-shaped pattern of population growth represent ? How is J-shaped pattern different from it and why ?
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