Home
Class 12
BIOLOGY
Bending of stem/coleoptile towards light...

Bending of stem/coleoptile towards light or shoot of potted plant placed near a window is due to
(a) Greater oxygen availability to the tip
(b) More auxin content on the shaded side
(c) Greater light availability to tip
(d) Availability of necessary warmth to the tip

A

Greater oxygen availability to the tip

B

More auxin content on the shaded side

C

Greater light availability to tip

D

Availability of necessary warmth to the tip

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Similar Questions

Explore conceptually related problems

The chemical substance P is made and secreted by the meristematic tissue at the tip of stem (or shoot) of a plant. The chemical substance P is responsible for a phenomenon Q in plants in which the stem bends towards the source of light. The same chemical substance P has an opposite effect on the root of a plant. It causes the root of a plant to bend away from the source of light in a process called R. State whether P prefers to remain in the sunlit side of a stem or in shade.

The chemical substance P is made and secreted by the meristematic tissue at the tip of stem (or shoot) of a plant. The chemical substance P is responsible for a phenomenon Q in plants in which the stem bends towards the source of light. The same chemical substance P has an opposite effect on the root of a plant. It causes the root of a plant to bend away from the source of light in a process called R. What is the effect of substance P on the rate of growth of (a) a root and (b) a stem?

The chemical substance P is made and secreted by the meristematic tissue at the tip of stem (or shoot) of a plant. The chemical substance P is responsible for a phenomenon Q in plants in which the stem bends towards the source of light. The same chemical substance P has an opposite effect on the root of a plant. It causes the root of a plant to bend away from the source of light in a process called R. What is the name of the process (a) Q and (b) R ?

The chemical substance P is made and secreted by the meristematic tissue at the tip of stem (or shoot) of a plant. The chemical substance P is responsible for a phenomenon Q in plants in which the stem bends towards the source of light. The same chemical substance P has an opposite effect on the root of a plant. It causes the root of a plant to bend away from the source of light in a process called R. What is the general name of the chemical substance like P ? Name another substance which belongs to this class of chemical substances.

The chemical substance P is made and secreted by the meristematic tissue at the tip of stem (or shoot) of a plant. The chemical substance P is responsible for a phenomenon Q in plants in which the stem bends towards the source of light. The same chemical substance P has an opposite effect on the root of a plant. It causes the root of a plant to bend away from the source of light in a process called R. What is the chemical substance P ?

A well-watered healthy potted plant with variegated leaves was kept in darkness for about 24 hours. It was then set-up as shown in the diagram below and exposed to light for about 12 hours. At the end of this time, leaf X and leal y were tested for starch. Study the diagram and answer the questions that follow Select the correct leaf from the five available choices shown in the diagram as A, B, C, D and E Rewrite the correct answer by filling in the appropriate letter for the questions that follow : After the starch test, leaf X would look like ........

A well-watered healthy potted plant with variegated leaves was kept in darkness for about 24 hours. It was then set-up as shown in the diagram below and exposed to light for about 12 hours. At the end of this time, leaf X and leal y were tested for starch. Study the diagram and answer the questions that follow Select the correct leaf from the five available choices shown in the diagram as A, B, C, D and E Rewrite the correct answer by filling in the appropriate letter for the questions that follow : After the starch test, leat Y would look like ................

A double slit interference pattern is produced on a screen, as shown in the figure, using momochromatic light of wavelength 500 nm. Point P is the location of the central bright fringe, that is produced when light waves arrive in phase without any path difference. A choice of the three strips A, B and C of transparent materials with different thickness and refractive indices is available, as shown in the table. These are placed over one or both of the slits, singularly or in conjunction causing the interference pattern to be shifted across the screen from the original pattern. In the Column - I, how the strips have been placed, is mentioned whereas in the Column-II, order of the fringe at point P on the screen that will be produced due to the placement of the strip(s), is shown. Correctly match both the column.