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प्रश्न
Name the plant organ which is positively geotropic
उत्तर
Roots
APPEARS IN
संबंधित प्रश्न
Plant parts show two types of movements, one dependent on growth and other independent of growth. Give one example which does not depend on growth
Name the plant part which bends towards light but away from the force of gravity.
Which of the following is not caused by a growth movement?
The plant hormone which triggers the fall of mature leaves and fruits from the plant body is:
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 a 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.
(a) What is the chemical substance P?
(b) State whether P prefers to remains in the sunlit side of a stem or in shade.
(c) What is the effect of substance P on the rate of growth of (i) a root, and (ii) a stem?
(d) What is the name of process (i) Q, and (ii) R?
(e) What is the general name of chemical substances like P? Name another substance which belongs to this class of chemical substances.
When the leaves of a sensitive plant are touched with a finger, they fold up and when light fades at dusk, the petals of a dandelion flower close.
state two ways in which the above two processes differ.
Differentiate between:
Thigmotropism and geotropism
The venus flytrap plants are examples of ______.
Plants exchange gases ______ continuously through these stomata.
Ali has some pea plants in his garden which need a support to grow as seen in the picture given below:
- Name the phenomenon depicted by the shoot in the given figure.
- Define the above phenomenon.
- Write the name of the part marked X.
