NEET BIOLOGY

Detailed explanation-1: -Phototropism is the growth of an organism in response to a light stimulus. Phototropism is most often observed in plants, but can also occur in other organisms such as fungi. The cells on the plant that are farthest from the light contain a hormone called auxin that reacts when phototropism occurs.

Detailed explanation-2: -This negative feedback on the WCC is termed photoadaptation and allows for the fungus to be responsive to increasing light intensities over the course of the day. Ultimately, the amount of WCC activity is dependent upon the amount of VIVID in the system, which itself is a function of the WCC-mediated light response.

Detailed explanation-3: -Phototropism, the curvature of a growing part of a plant or fungus toward or away from light, is a well known, but not particularly well understood, phenomenon.

Detailed explanation-4: -Plants also exhibit phototropism, or growing toward a light source. This response is controlled by a plant growth hormone called auxin. As shown in Figure below, auxin stimulate s cell s on the dark side of a plant to grow longer. This causes the plant to bend toward the light.

Detailed explanation-5: -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.