Plants
Trending Questions
How does phototropism occur in plants?
- Fibrous roots
- Tap roots
- Adventitious roots
- Nodular roots
What would happen if the tips of the stem is cut off?
Growth of pollen tube towards ovule is called
Phototropism
Geotropism
Hydrotropism
Chemotropism
Response of a plant to the change in relative length of the day and night is called phototropism.
True
False
The growth of plants differs from the growth of animals in being
Localised
Diffused
Both a and b
None of them.
What is the meaning of positively geotropic and negatively geotropic?
Movement of plants in response to a chemical stimuli is called ___.
phototropism
chemotropism
geotropism
hydrotropism
Leena wanted to study about the growth of plants and decided to conduct a simple experiment. She took a closed cardboard box with a hole on one side and kept a little pot of plant in it. She kept this set up near a window in her room with access to sunlight. After some days, she saw that the stem of the plant is bending (almost reaching) towards the hole in the cardboard, from which the sunlight comes. What is the name of the phenomenon observed here, by which the plant responds to sunlight?
Phototropism
Hydrotropism
Chemotropism
Geotropism
The anthers of the stamen produce a powdery material called pollen which consists of particles called
Auxins are abundantly produced in
Base of root
Base of the shoot
Shoot
Meristematic region of shoot
Growth is a :
Reversible increase in size
Reversible increase in shape
Irreversible increase in size
None of the above
Movements in plants are seen in the form of bending, twisting and elongation of certain parts.
False
True
The leaves of touch me not[Mimosa-pudica] plant droop when touched.
Why plants cannot walk
Petioles of leaves are weakened by which hormone(s)?
Auxin
Gibberellin
Cytokinin
Abscisic acid
Name any two environmental signals which could affect some stages of plant growth.
Which of the following is not a part of the rapid movement?
Sudden propulsion of spores
Creep
Explosive spore dispersal
None of the above
What is said to get activated when the Mimosa pudica plant is touched?
- Positive Geotropism
- Positive Phototropism
- Negative Phototropism
- Negative Geotropism
Growth in plants and animals is a/an:
reversible change
irreversible change
exothermic change
endothermic change
Give one word for the following
Movements of a plant towards or away from the direction of a stimulus.
Identify the tropic movement in the picture below:
Chemotropic movement
Haptotropic movement
Hydrotropic movement
Geotropic movement
The organ responsible for reproduction in flowering plants is
Rahul's uncle is a horticulturist and grows many beautiful and exotic flowers. However, lately he has started noticing that, the new flowers are not forming due to failure of reproduction. He further sees that it might be due to inability of the movement of pollen towards to ovary. Thus, hindering the fertilisation. The pollen is not responding to which of the critical phenomenon?
Hydrotropism
Chemotropism
Haptotropism
Phototropism
The growth of tendrils in pea plants is due to
Effect of light
Effect of gravity
Rapid cell divisions in tendrillar cells that are away from the support
Rapid cell divisions
(i) What are nastic movements?
(ii) Why do these movements occur?
(iii) List their main features.
(iv) Give an example of any two nastic movements.
Mention any one factor which has been credited as a responsible factor for the reaction of the Mimosa pudica plant when touched?
