Question

Stems are

• A. positively phototropic and negatively geotropic.
• B. negatively phototropic and positively geotropic.
• C. positively phototropic and positively geotropic.
• D. negatively phototropic and negatively geotropic.

Answer 1

The correct option is A

positively phototropic and negatively geotropic.

The correct option is A.

Explanation of the correct option

1. Plants exhibit gradual movements in response to external stimuli. These movements are called tropic movements.
2. Movement in response to light is called phototropism. Movement in response to gravity is called geotropism.
3. Movement in the direction of the stimulus is called positive tropism and movement in the direction away from the stimulus is called negative tropism.
4. Stems move towards the direction of light (positive phototropism) and stay upright, against the direction of gravity pull (negative geotropism).

Final answer:

Stems are positively phototropic and negatively geotropic.