Advertisements
Advertisements
प्रश्न
What does a root do in response to gravity? What is this phenomenon known as?
उत्तर
The roots of a plant always grow downwards in response to gravity. This phenomenon is known as geotropism.
APPEARS IN
संबंधित प्रश्न
Give the scientific terms used to represent the Growing of roots towards the earth.
What does a Mimosa pudica plant do in response to touch? What is this phenomenon known as?
Which of the following is a growth movement and which is not?
- Folding up of leaves of sensitive plant on touching with hand.
- Folding up of petals of dandelion flower when light fades.
Plant roots grow ______ and in the direction of force of ______.
The root of a plant grows downward. This is known as ______.
Why is the closing of a dandelion flower at dusk (when it gets dark) not a tropism?
The plant hormone which triggers the fall of mature leaves and fruits from the plant body is:
The top part A of the flask-shaped reproductive organ X in the flower of a plant secrets a surgery substance into its lower part B which goes towards the bottom part C of the flask-shaped organ. When a tiny grain D coming from the top part E of another reproductive organ Y i the flower falls on part A, it grows a long tube F through the organ X i response to the sugary substance and reaches the bottom part C of flask-shaped organ to carry out fertilisation.
(a) Name parts (i) organ X, and (ii) organ Y, inside the flower?
(b) Name parts (i) A (ii) B, and (iii) C, of flask-shaped organ.
(c) Name (i) grain D, and (ii) part E of organ Y.
(d) Name the tube F.
(e) What is the phenomenon of growing a long tube in response to sugary substance in the process of fertilisation in a flower known as?
The response of plants to gravity is known as geotropism. How are plant parts sensitive to gravity? Describe with the help of a diagram.
Some plants like pea plants have tendrils which help them to climb up other plants. Explain how is it done. Name the plant hormone responsible for this movement.
