Observe the experimental sets $[A]$ and $[B]$ .
Observe the test tube $A$ and $B$ . From the list given below, choose the combination of response of shoot and root that are observed in $B$ .

Positive phototropism and positive geotropism

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Negative phototropism and positive geotropism

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Positive phototropism and negative geotropism

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Only negative phototropism

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Solution

The correct option is A Positive phototropism and positive geotropism
In the test tube A at day 1, the plant is in the inverted position.
In the figure, at day 5, the shoot is moving towards sun-light as the shoot shows positive phototropism because they require sunlight for photosynthesis.
The root is moving towards gravity as the root shows positive geotropism because they require soil for the growth and anchoring of plant.
So, the correct answer is option A- 'Positive phototropism and positive geotropism'.

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Similar questions

Q. (a) Define phototropism. Give one example of phototropism.
(b) How does phototropism occur in a plant stem (or shoot)? Explain with the help of labelled diagrams.
(c) What is meant by positive phototropism and negative phototropism? Give one example of each type.

Stems are :

(a) positively geotropic and negatively phototropic

(b) positively geotropic and positively phototropic

(d) negatively phototropicand positively geotropic

Q. The root of a plant is :
(i) positively phototropic but negatively geotropic
(ii) positively geotropic but negatively phototropic
(iii) negatively phototropic but positively hydrotropic
(iv) negatively hydrotropic but positively phototropic
(a) (i) and (ii) (b) (ii) and (iii) (c) (iii) and (iv) (d) (i) and (iv)

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.
(a) Name the part X of plant.
(b) Name the part Y of plant.
(c) Which part of the plant, X or Y, will exhibit positive hydrotropism?
(d) Which part of the plant, X or Y, can have tendrils on it?
(e) Which phytohormone causes the part X to exhibit negative phototropism?

The root of a plant is :

(i) positively phototropic but negatively geotropic

(ii) positively geotropic but negatively phototropic

(iii) negatively phototropic but positively hydrotropic

(iv) negatively hydrotropic but positively phototropic

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Observe the experimental sets [A] and [B].Observe the test tube A and B. From the list given below, choose the combination of response of shoot and root that are observed in B.

Observe the experimental sets $[A]$ and $[B]$ .
Observe the test tube $A$ and $B$ . From the list given below, choose the combination of response of shoot and root that are observed in $B$ .