Water bloom is generally caused by from Biology Biological Class

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 Multiple Choice QuestionsMultiple Choice Questions

71.

'Clamp connections' are observed in

  • Basidiomycetes

  • Zygomycetes

  • Ascomycetes

  • Oomycetes


72.

Movements by pseudopodia of Amoeba are due to change in

  • pressure

  • atmosphere

  • temperature

  • viscosity


73.

In Whittaker's system of classification prokaryotes belong to the kingdom

  • Monera

  • Protista

  • Animalia

  • Fungi


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74.

Water bloom is generally caused by

  • green algae

  • blue- green algae

  • bacteria

  • Hydrilla


B.

blue- green algae

Water blooms are formed by the growth of some microscopic or semi- microscopic algae such as AnabaenaArthrospiraNodulariaNostoc etc. These may be harmful because they are indirectly responsible for fish mortality due to depletion of oxygen.


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75.

A genophore is made up of 

  • a single double stranded DNA

  • a single stranded DNA

  • RNA and histones

  • histones and non- histones


76.

There exists a close association between the alga and the fungus within a lichen. The fungus

  • fixes the atmospheric nitrogen for the alga

  • provides protection, anchorage and absorption for the alga

  • provides food for the alga

  • releases oxygen for the alga


77.

Which one shows bio-luminescence?

  • Noctiluca

  • Polystomella

  • Entamoeba

  • Suctoria


78.

Protists are

(i) unicellular and prokaryote

(ii) unicellular and eukaryote

(iii) multicellular and eukaryote

(iv) autotroph or heterotroph

  • (i), (ii) and (iii)

  • (ii), (iii) and (iv)

  • (iii), (iv)

  • (ii), (iv)


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79.

Which one has no intermediate host?

  • Taenia

  • Ascaris

  • Fasciola

  • Plasmodium


80.

Litmus is obtained from

  • Rocella montagnei

  • Lasallia postulata

  • Both (a) and (b)

  • Cladonia crispata


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