Please select a subject first
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The level of air pollution is very high in a city. Suggest any four measures which should be taken by the government to control it.
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Which organisms constitute the last trophic level?
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With reference to the levels of an organisation, differentiate between living organisms and non-living objects.
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| In a forest ecosystem, a large population of insect feeds upon a banyan tree. Several small birds feed upon these insects. The small birds are fed upon by big-sized birds. |
- With respect to this ecosystem, draw a pyramid for each biomass and a pyramid of number.
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If 20,000 Kcal energy is available at the level of insects, calculate the amount of energy available at the level of big-sized birds.
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Write the complete name of the diagnostic test for AIDS.
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Expand the following abbreviation:
HIV
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Mention the causative agent and the preventive measures for the following: Gonorrhoea
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Name the causative agent of gonorrhea.
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Expand the following abbreviation:
PID
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Sapna has been diagnosed with an infection of the reproductive tract caused by bacteria. She experiences burning sensation during urination, pain around her genitalia and observes pus containing discharge. Her doctor tells her that this infection has an incubation period of two to five days but can be cured. |
What is the biological name of the causative agent of the disease Sapna is suffering from?
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All STDs do not affect the genital organs. Justify the statement.
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The following is well-known abbreviation, which have been used in this chapter. Expand to its full form:
NACO
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Type of Interaction where an individual sacrifices its own welfare (life) for the benefit of another animal of its own species is ______.
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State four features of flowers pollinated by insects.
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Give four adaptations shown by flowers pollinated by wind.
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Briefly discuss any two methods by which plants avoid self-pollination.
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Name the pollinating agent of a flowering plant with large and coloured flowers with sticky stigma. State one characteristic feature of the pollen grains produced in such flowers.
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What is cryopreservation?
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Mention one significant difference between Parenchyma and Sclerenchyma.
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