Highest auxin concentration occurs

In growing tips

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In leaves

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At base of plant organs

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In xylem and phloem

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Solution

The correct option is A In growing tips
Auxin is a plant hormone. The highest concentration of it occurs in growing tip. Apical dominance is a phenomenon in which central stem is dominant and lateral stems are suppressed. It promotes stem elongation and inhibits growth of lateral buds. Hence, low concentration of auxin inhibits growth in stem.
Thus, the correct answer is option A.

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Similar questions

Identify the correct set of statements related to the movement of substances through vascular tissues.

I. Xylem mainly translocates water, minerals salts and also organic solutes.

II. Phloem mainly translocates a variety of organic solutes and also inorganic solutes.

III. Xylem transports substances from roots to aerial parts of the plants.

IV. Phloem transports substances from leaves to other parts of the plants.

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