ICSE Class X Biology 2018 Solved Papers

A potted plant with variegated leaves was taken in order to prove a factor necessary for photosynthesis. The potted plant was kept in the dark for 24 hours and then placed in bright sunlight for a few hours. Observe the diagrams and answer the questions.

Question : 51 of 97

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What will be the result of the starch test performed on leaf '

A

' shown in the diagram? Give an example of a plant with variegated leaves.

Solution:

On performing starch test using Iodine solution on leaf A. The green areas turn blue black where as the pale yellow areas turn brown.
Coleus/Crotin etc. have variegated leaves.

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