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STD 12 - 7. human health and disease — Biology STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 ScienceBiologySTD 12 - 7. human health and disease1 Mark
MCQ
Infection of Ascaris usually occurs by
  • A
    Tse-­tse-fly
  • B
    mosquito bite
  • ✓
    drinking water containing eggs of Ascaris
  • D
    eating imperfectly cooked pork.
✓

Answer

Correct option: C.
drinking water containing eggs of Ascaris
c
(c) : Man acquires infection of Ascaris by directly ingesting Ascaris eggs, containing the infective second stage larva, with contaminated food or water. Life cycle of Ascaris is monogenetic. There is no vector or intermediate host.

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