Question

Is phototropism positive or negative?

Answer 1

The growth of an organism in response to a light stimulation is known as phototropism. Phototropism is most common in plants, but it can also be seen in other species like fungi. When phototropism occurs, a molecule called auxin interacts in the plant's cells that are farthest from the light.

Complete answer:
The growth of an organism in response to a light stimulation is known as phototropism. Phototropism is most common in plants, but it can also be seen in other species like fungi. When phototropism occurs, a molecule called auxin interacts in the plant's cells that are farthest from the light. The plant's cells on the side facing the light get stretched as a result of this. One of the various plant tropisms or movements that respond to environmental stimuli is phototropism. Positive phototropism refers to development toward a light source, whereas negative phototropism refers to growth away from light.
Different portions of the plant respond to different stimuli.
Positive phototropism refers to a plant stem's response to light, which means the stem grows towards the light.
Negative phototropism describes the plant root's response to light, which implies the root develops away from the light.
Positive phototropism refers to a plant stem's response to light, which means the stem grows towards the light. Negative phototropism describes the plant root's response to light, which implies the root develops away from the light.

Note:
The shaded side of a stem produces more auxin and grows longer, causing the stem to expand towards the light. The plant does not bend in the direction of the light. It grows because auxin stimulates the cells on the shaded side to elongate, causing this side to develop faster. The stem grows towards the light as a result of the unequal growth of the two sides.