Question

The roots of a coconut tree are seen growing far from the plant. Such a kind of movement of root for want of water is
(a)Phototropism
(b)Geotropism
(c)Chemotropism
(d)Hydrotropism

Answer 1

Hint: The process of the movement of plants turning or growing with respect to a particular stimulus present in the environment.

Complete answer:
The roots of the coconut tree grow far away from the plant, this type of plant to get water is called hydrotropism. The roots of the tree expand outer towards the water to absorb more water. The coconut tree consists of thin fibrous near the surface.

Additional information:
-The tropism or the movement of the plant is dependent on the direction of the movement of the stimulus.
-it occurs in three steps; a sensation is produced for a particular stimulus, then a signal is sent to the plant part, and lastly, the plant will grow in the direction of the stimulus.
-Hydrotropism is an involuntary movement of organisms turning towards or away from the plants.
-The movement may be positive or negative, depending upon the stimulus-response.
-It increases the humidity and efficiency of the plant in an ecosystem.
-The hydrotropism process started by root cap sensing water and then sends a signal to the elongation part of the root.
-Coconut plant growth in areas of high rainfall and sunlight, they do not require much water from outside.
-They have a system of fibrous roots that are neither tap root nor normal root.

So, the correct answer is ‘Hydrotropism.’

Note: The phenomenon of hydrotropism was recorded around 250 years ago without any name. Later it was named by Wiesner. The growth of the plant roots in accordance with the microgravity of the environment is found to be very important when the plant grows in response to hydrotropism. This process had been developed millions of years ago when plants started their life in the dry land.