Question

19. A thin peel was pulled out from the lower surface of a leaf of boat lily and the
following types of cells were observed.
(1) Name the parts labelled A and B?
(11) State one function each of 'A' and 'B'.
(11) Name the organ system which can be formed by the following organs-mouth,
stomach and liver.
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Answer 1

Please attach the picture as well..