Multiple choice

In which of the following years did Ronald Ross find malaria parasite infection in mosquitoes?

  1. 1897

  2. 1850

  3. 1835

  4. 1859

  5. -
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A Correct answer
Explanation

Oocysts are stages of malaria parasites developing in the walls of a mosquito midgut (stomach). The midgut is in the lower half and the oocysts appear as multiple spheres that are embedded in the midgut's wall. Such oocysts were seen, for the first time, by Sir Ronald Ross on 20th August, 1897.

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