A 4 cm straight piece of stem from a herbaceous plant was split lengthwise into two similar pieces. The pieces were placed in sugar solutions...

      

A 4 cm straight piece of stem from a herbaceous plant was split lengthwise into two similar pieces. The pieces were placed in sugar solutions of different concentrations for 30 minutes. Their appearance after 30 minutes is as shown below.
fig2131020191035.png
Account for appearance of the pieces in solution A and B.

  

Answers


Kavungya
Piece A was placed in a hypotonic solution while B was placed in a hypertonic solution;
Inner/cortex cells of piece A gained water while those of B lost water molecules by osmosis.
Cortex cells in A became turgid and increased in length curving outwards while in B the cells
became flaccid reduced in length curving inwards; The epidermal cells are covered by a waterproof
cuticle hence do not gain or loose water;
Kavungya answered the question on October 3, 2019 at 07:35


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