Multiple Choice Questions

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Identify the correct type of food chain

Dead animal > Blow fly maggots > Common frog > Snake

  • Grazing food chain

  • Detrital food chain

  • Decomposer food chain

  • Predator food chain


B.

Detrital food chain

detrital food web consists of a base of organisms that feed on decaying organic matter (dead organisms), called decomposers or detritivores. These organisms are usually bacteria or fungi that recycle organic material back into the biotic part of the ecosystem as they themselves are consumed by other organisms.


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Which is not applicable to the biological species concept

  • Hybridization

  • Natural population

  • Reproductive isolation

  • Gene pool


DNA sequences that code for protein are known as

  • introns

  • exons

  • control regions

  • intervening sequences


In AIDS, HIV kills

  • Antibody molecule

  • T-helper cell

  • Bone-marrow cells

  • T-cytotoxic cell


The wild-life protection act was introduced in

  • 1972

  • 1981

  • 1986

  • 1991


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Which one of the following is a systematic insecticide

  • Malathion

  • Endrin

  • Parathion

  • Furadan


The intensity levels of whispering noise is

  • 10-15 dB

  • 20-40 dB

  • 45-50 dB

  • 50-55 dB


Which is the correct sequence of arrangement of types of WBC in decreasing order in terms of number per mm3 of human blood

  • Eosinophils > Basophils > Neutrophils

  • Basophils > Eosinophils > Neutrophils

  • Neutrophils > Eosinophils > Basophils

  • Eosinophils > Neutrophils > Basophils


In honey, the percentage of maltose and other sugar is

  • 9.2

  • 8.81

  • 10.5

  • 11.2


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Seedless banana is

  • parthenocarpic fruit

  • multiple fruit

  • drupe fruit

  • true fruit