Astudent decides to set up an experiment in which he adds an auxin to one of two beds of growing flowering plants to observe the elongation. two weeks after applying an auxin to that bed, rather than increased elongation, he notes that the plants to which auxin was added are losing their leaves. what is the most likely reason for this lack of elongation? a. auxins cause cell elongation. he was looking at the entire plant and not using a microscope to look at the cells.
b. he must have added too much of the auxin to the experimental plant bed.
c. he did not add enough of the auxin to the experimental plant bed.
d. the auxin he applied does not have the same effect on all plants.

The correct answer is option - b.

Explanation:

Auxin is one of the plant hormones that consist of characteristics like morphogen. It has a cardinal role in plant body growth and development by a process that regulates behavioral and growth in the life cycle of a plant.

In this experiment, he must have added too much of auxin to the experimental plant as auxins are toxic to the plants if present in large concentrations. If too much auxin added to the plant body it stimulates the production of ethylene which causes fall of leaves and stops the elongation growth.

Thus, the correct answer is option B.

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