Which of the following plant part exhibits negative phototropism ?

(a) root

(b) branch

(c) leaves

(d) stem

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Solution

(a) Root

Roots bend away from the light source and show negative phototropism.

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The plant part which exhibits negative geotropism is:

(a) root

(b) stem

(d) leaves

Q. Which part of the plant exhibits negative phototropism?

A potted plant is growing in a transparent glass jar. In this plant, X and Y are the two growing parts having a lot of meristematic tissue. It is observed that the part X of this plant exhibits positive geotropism but negative phototropism. On the other hand, part Y of this plant exhibits negative geotropism but positive phototropism.
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Roots usually exhibit negative phototropism.

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Specimen A: Stem profusely branched, leave with reticulated venation, tap root system.
Specimen B: Stem not branched, leaves with parallel venation, fibrous root system.

From the above characters identify the class of specimen A and B.

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Which of the following plant part exhibits negative phototropism ? (a) root (b) branch (c) leaves (d) stem

(a) Root Roots bend away from the light source and show negative phototropism.

Which of the following plant part exhibits negative phototropism ?

(a) root

(b) branch

(c) leaves

(d) stem

(a) Root

Roots bend away from the light source and show negative phototropism.