NEET BIOLOGY

Detailed explanation-1: -Plant movement in reaction to chemical stimuli is known as chemotropism. The growth response is positive chemotropism when it is directed toward the stimulus. When the growth response is away from the stimulus, it is called negative chemotropism. Example: Growth of pollen tubes towards ovules.

Detailed explanation-2: -Chemotaxis (from chemo-+ taxis) is the movement of an organism or entity in response to a chemical stimulus. Somatic cells, bacteria, and other single-cell or multicellular organisms direct their movements according to certain chemicals in their environment.

Detailed explanation-3: -The growth of plant parts in response to a chemical stimulus is known as chemotropism. The growth of a pollen tube towards the ovule induced by a sugary stimulus is an example of chemotropism. This is an example of positive chemotropism as the pollen tube grows towards the stimulus.

Detailed explanation-4: -The movement in response to a chemical is called chemotrophism. It is defined as the growth of an organism that is navigated by a chemical stimulus. It is secreted from the outside of an organism. This type of stimulus is produced by the organism such as fungi, plant, and bacteria.

Detailed explanation-5: -Chemotropism in plants An example of positive and negative chemotropism is shown by a plant’s roots; the roots grow towards useful minerals displaying positive chemotropism, and grow away from harmful acids displaying negative chemotropism.