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How many genera are recognised in the international cloud classification?

  • A.seven
  • B.ten
  • C.four
  • D.fifteen

Answer: B

Correct answer: ten

Ten genera are recognised: cirrus, cirrocumulus and cirrostratus in the high étage; altocumulus and altostratus in the middle; stratocumulus, stratus, nimbostratus and cumulus in the low; and cumulonimbus, which spans them all. Below the genera come species, varieties and supplementary features, in a hierarchy modelled deliberately on biological classification.

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