SSC MTS EXAM

Detailed explanation-1: -Response to environmental stimuli is known as tropism and the stimuli may be light, water, gravity, etc. Various types of tropism are: Phototropism: Movement or growth of plants towards light is called phototropism. For example, sunflower turning towards the sun.

Detailed explanation-2: -If the stem grows towards the sunlight, it is called as positively phototropic movement. It is a tropic movement induced in the plant, in response to the stimuli called as light.

Detailed explanation-3: -Some common plant stimuli include light, gravity, water, movement of the sun, and touch. The naming of the tropism is associated with the stimulus. For example, the movement of plant roots towards water is called hydrotropism.

Detailed explanation-4: -Phototropism is the ability of the plant to re-orient the shoot growth towards a direction of light source. Phototropism is important to plants as it enhances the ability of plants to optimize their photosynthetic capacity. As discussed above, phototropic response is exclusively controlled by phots.