Question

Hydrotropism is important for plants.
(a) True
(b) False

Answer 1

Hint: Hydrotropism word related to stimulus toward the water. The plant is divided into two main parts, root, and shoot. The root of a plant is underground which mainly absorbs water and minerals for plants whereas the shoot is present above to the ground level, performing photosynthesis.

Complete answer:
Carl. A Neuberg in 1916 coined the term Hydrotropism which means the involuntary orientation of organisms toward water concentration. The root of a plant is positively hydrotropic because it absorbs water and minerals from soil which helps for the growth of a plant. The root cap of the root sense the moisture environment and movement of the root takes place toward the moisture gradient. Hydrotropism mainly seen by desert plants because due to less water content in soil root moves in the direction where water is present.

Additional information:
Tropism word related to the movement of an organism in search of nutrients helps for its growth and function. Tropism is divided mainly into phototropism, geotropism, chemotropism, and hydrotropism and other examples of tropism include thigmotropism, traumatropism, galvanotropism, and electrotropism. The plant root shows hydrotropism and geotropism while the shoot shows phototropism. Geotropism word related to the force of gravity whereas phototropism word relate to photosynthesis. Thigmotropism is the movement of tendrils in the direction of the object.

So, the correct answer is ‘True’.

Note: The plant growth hormone auxin plays an important role in hydrotropism as it causes root growth, root bending, and cell growth. The pneumatophores of Rhizophora are positively hydrotropic but negatively geotropic because they grow in swampy areas and bear lentils for the exchange of gases.