Question

Pneumatophores are ?

• A. Negatively geotropic
• B. Positively geotropic
• C. Negatively phototropic
• D. Thigmotropic

Answer 1

The correct option is A

Negatively geotropic

The correct answer is option A:

Explanation for the correct answer:

1. Breathing roots are another name for pneumatophores.
2. These roots may be found in the roots of mangrove plants.
3. These are the modifications that occur in a root that develops in the same direction as the shoot.
4. As a result, they are both negatively geotropic and favorably phototropic.

Explanation for the incorrect answer:

Option B:

1. Positive geotropism occurs when a portion of a plant grows in the direction of gravity.
2. Positive geotropism may be seen in the downward development of roots.
3. Primary stems develop in an upward manner against gravity, exhibiting negative geotropism.

Option C:

1. One of the various plant tropisms or movements that respond to environmental stimuli is phototropism.
2. Positive phototropism refers to development toward a light source, whereas negative phototropism refers to growth away from light.

Option D:

1. Thigmotropism is a mechanosensory response to a touch stimulation that causes directional growth movement.
2. Thigmotropism is most commonly observed in twining plants and tendrils, but plant scientists have discovered it in blooming plants and fungi as well.

Final answer:

Pneumatophores are Negatively geotropic.