Advertisements
Advertisements
Question
Plant roots grow downward in response to ______.
Solution
Plant roots grow downward in response to gravity.
APPEARS IN
RELATED QUESTIONS
How do auxins promote the growth of a tendril around a support?
What happens to the dandelion flower
- during the daytime, and
- at night?
What is this phenomenon known as?
What does a tendril do in response to the touch of a support? What is this phenomenon known as?
To which directional stimuli do roots respond?
The bending of the root of a plant away from a source of light is caused by a plant hormone called :
(a) cytokinin
(b) gibberellin
(c) abscisic acid
(d) auxin
Higher Order Thinking Skill.
There are 3 plants A, B and C. The flowers of A open their petals in bright light during the day but closes when it gets dark at night. On the other hand, the flowers of plant B open their petals at night but closes during the day when there is bright light. The leaves of plant C fold up and droop when touched with fingers or any other solid object.
- Name the phenomenon shown by the flowers of plant A and B.
- Name one plant each which behaves like the flowers of plant A and B.
- Name the phenomenon exhibited by the leaves of plant C.
- Name the plant which behaves like the leaves of plant 'C'?
What is the other name for thigmonasty?
Which flowering plant shows a photo nasty just opposite to that of a Dandelion?
Give an example for the movement of plant part which is very quick and can be observed easily.
The height of a plant is regulated by ______.
