Advertisements
Advertisements
Question
Which of the following acts as a stimulus in the process of hydrotropism?
(a) hydrocarbon
(b) hydrogen oxide
(c) hydrogen chloride
(d) hydrogen peroxide
Solution
(b) Hydrogen oxide
Water or hydrogen oxide acts as a stimulus in the process of hydrotropism.
APPEARS IN
RELATED QUESTIONS
How do auxins promote the growth of a tendril around a support?
What is a tendril?
Name the five types of tropisms.
Name the plant organ which is positively phototropic.
Define geotropism.
There are three plants A, B and C. The flowers of plant A open their petals in bright light during the day but close them when it gets dark at night. On the other hand, the flowers of plant B open their petals at night but close them 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 (i) plant A and (ii) plant B.
- Name one flower each which behaves like the flower of (i) plant A and (ii) plant B.
- Name the phenomenon exhibited by the leaves of plant C.
- Name a plant whose leaves behave like those of plant C.
- Which plant/plants exhibit the phenomenon based on growth movements?
Any change in the environment to which an organism responds is called ____________.
Give an example for the movement of plant part which is very quick and can be observed easily.
Why do stems show positive phototropism?
Study the diagrams given below and answer the following questions:
- Name the structures shown as X and Y in the figures (A) and (B), respectively.
- Write the functions performed by the structures X and Y.
- Name the phenomenon depicted and define it.
- How do the structures X and Y differ from each other?
- Give examples of the plants which show the said phenomenon.