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 Multiple Choice QuestionsMultiple Choice Questions

61.

What are labelled phases A, B and C in given sigmoidal growth curve.

  •          A           B           C
    stationery Log Lag
  •          A           B           C
    Lag stationery Log
  •          A           B           C
    Log Lag stationery
  •          A           B           C
    Lag Log stationery

62.

Monarch butterfly escapes from predators by

  • foul smell

  • bitter taste

  • colour combination

  • rough skin


63.

Assertion : All pathogens are parasites but all parasites are not pathogens.

Reason : Majority of the parasites confer benefits to the host.

  • If both assertion and reason are true and reason is the correct explanation of assertion

  • If both assertion and reason are true but reason is not the correct explanation of assertion.

  • If assertion is true but reason is false

  • If both assertion and reason are false


64.

Eugenics is the branch concerned with

  • improving the quality of human race by symptomatic treatment of genetic diseases.

  • improving the quality of human populations by the application of genetic principles

  • improving the quality of human race by providing best suitable environment.

  • none of the above


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65.

Which of the following statements is incorrect

  • Lichen, an association of fungus and algae is an example of mutualism.

  • Those epiphytes which use other plants for support only and not for water or food supply and are examples of commensalism.

  • Sea-anemone on hermit-crab is an example of protocooperation.

  • Mutualism, protoocoperation, commensalism cannot be included under symbiosis.


66.

Assertion: Koel does not build nest for egg laying.

Reason: Koel lays its eggs in the nest of tailor bird.

  • If both assertion and reason are true and reason is the correct explanation of assertion

  • If both assertion and reason are true but reason is not the correct explanation of assertion

  • If assertion is true but reason is falsen

  • If both assertion and reason are false.


67.

Which part of the world has a high density of organism?

  • Deciduous forests

  • Grasslands

  • Tropical rain forests

  • Savannahs


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68.

Assertion : The age-sex structure of human population in countries like France and Germany gives a steep pyramid.

Reason : In countries like Sudan and India the population is increasing at a rapid rate.

  • If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion

  • If both Assertion and Reason are true but the Reason is not the correct explanation of the assertion

  • If Assertion is true but Reason is false

  • If both Assertion and Reason are false


B.

If both Assertion and Reason are true but the Reason is not the correct explanation of the assertion

The most important demographic characteristic of a population is its age sex structure which is also known as population pyramids. Age sex pyramids display the percentage or actual amount of a population broken down by gender and age. Developed countries with stable population gives a steep pyramid.

Population of Sudan and India are increasing at a rapid rate. Population growth rate for Sudan is 2.60% and for India is 1.40%.


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69.

Mr.X is eating curd/yoghurt. For this food intake in a food chain he should be considered as occupying

  • first trophic leve

  • second trophic level

  • third trophic level

  • fourth trophic level


70.

Which one of the following is a matching pair of certain organism(s) and the kind of association?

  • Shark and sucker fish - commensalism

  • Algae and fungi in lichens - mutualism

  • Orchids growing on trees - parasitism

  • Cuscuta (dodder) growing in other flowering plants - epiphytism.


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