The diagram below shows how a seed changes after it is planted in a well-watered soil.

      

The diagram below shows how a seed changes after it is planted in a well-watered soil.

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(a) Explain how the part labelled A straightens as shown in the last diagram.

(b) Other than storage of food for germination, state two functions of part B.

  

Answers


Maurice
(a) light causes the auxins to migrate to the lower side; leading to higher auxins concentration on the lower side than the upper side ;the cells on the lower side of the curvature grows and elongate faster than the those on the upper side; leading to straightening of hypocotyl.


(b)
-Turns green for photosynthesis prior to formation of the primary/first foliage leaves

- Protects the embryo from external mechanical damage during germination

- Storage of germination enzymes
maurice.mutuku answered the question on August 14, 2019 at 06:19


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