Why does test-tube ' B ' have more bubbles ...

ICSE Class X Biology 2015 Papers

SECTION - II

The diagram alongside shows two test-tubes $A$ and $B$ . Test-tube A contains a green water plant. Test-tube $B$ contains both a green water plant and a snail. Both Test-tubes are kept in sunlight. Answer the questions that follow :

Question : 39 of 98

Marks: +1, -0

Why does test-tube '

B

' have more bubbles of oxygen?

Solution:

Rate of photosynthesis is more in test tube

B

because the plant in

B

gets more

\mathrm{CO}_2

from the snail.

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