Multiple Choice Questions

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Nodules with nitrogen-fixing bacteria are found in

  • cotton

  • gram

  • mustard

  • wheat


B.

gram

Leguminous plants such as grams, beans, peas soyabeans, peanuts, alfalfa and clover contain root nodules. Later are formed due to symbiotic association between roots of leguminous plane and bacterium Rhizobium. The plants furnish anaerobic conditions and growth nutrients for the bacteria and the bacteria fix nitrogen to the plant.


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Major protein of connective tissue is

  • myosin

  • collagen

  • melanin

  • keratin


The usage of binomial names, for plant species was accepted by all after the publication of the work by

  • Hooker

  • Linnaeus

  • Bentham

  • Darwin


Blackman's law of limiting factor is applied to

  • respiration

  • transpiration

  • photorespiration

  • photosynthesis


Desert can be converted into green land by planting

  • oxylophytes

  • psammophytes

  • halophytes

  • trees


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In which kingdom, would you classify the archaea and nitrogen-fixing organisms. If the five-kingdom system of classification is used?

  • Protista

  • Monera

  • Plantae

  • Fungi


A prokaryotic cell lacks

  • true nucleus

  • nuclear membrane

  • membrane bound organelles

  • All of the above


Funaria gametophyte is

  • dioecious

  • heteroecious

  • autoecious

  • monoecious and autoecious


Powdery mildew of crops are caused by

  • bacteria

  • Ascomycetes

  • Basidiomycetes

  • Phycomycetes


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Induction of cell division and delay in senescence is done by

  • cytokinins

  • auxins

  • GA

  • Co-A