Question

Choose the correct alternate, which type of tropism exhibited by plants is correctly matched with the stimulus to which they respond.

Tropism	Stimulus
Hydrotropism	(i) Earth
Geotropism	(ii) Light
Chemotropism	(iii) Water
Phototropism	(iv) chemical

A. 1-ii, 2-i, 3-iv, 4-iii
B. 1-iii, 2-i, 3-iv, 4-ii
C. 1-iv, 2-i, 3-i, 4-ii
D. 1-iii, 2-i, 3-ii, 4-iv

Answer 1

Hint: Life is a delicate balancing act of several pursuits. Growth, nourishment, reproduction, excretion, and so on are examples of these activities. Animals and plants are two types of living beings that are distinct from one another. As a result, the pathways they take for a variety of life processes differ.
Plants, on the other hand, cannot run away from their predators. Plants, on the other hand, cannot. Plants have their own defence system to deal with the threat they confront.

Complete explanation:
Option A: Hydrotropism is a plant's response to a stimulus or gradient in water concentration that determines the direction of growth. A plant root growing in humid air bending toward a greater relative humidity level is a common example.
So, option A is not correct.
Option B: Hydrotropism is a plant's response to a stimulus or gradient in water concentration that determines the direction of growth.
Gravitropism (also known as geotropism) is a turning or growing movement caused by gravity in a plant, fungus, or animal.
Chemotropism is the growth of an organism or a component of an organism in response to a chemical stimulus from outside the organism. For instance, inside the style, a pollen tube grows.
The growth of organisms in reaction to light is known as phototropism. It is most commonly found in plants, although it can also be found in other species like fungi.
So, option B is correct.
Option C: Chemotropism is defined as an organism's growth guided by chemical stimuli from outside the organism. Bacteria, plants, and fungus have all been found to have it. A chemical gradient can have a favourable or detrimental impact on an organism's growth.
So, option C is incorrect.
Option D: Geotropism is the coordinated process of a plant's differential growth as a result of gravity tugging on it. It can also be found in fungus. Natural gravity or "artificial gravity" are two types of gravity. It is a characteristic of all higher and lower plants, as well as many other species.
So, option D is not correct.

Option B is correct.

Note:
Types Of Tropic movements:
Phototropism
Gravitropism
Chemotropism
Thigmotropism
Hydrotropism
Thermotropism