Question

What type of response is shown by the radicle of the seed?

• A. positively geotrophic
• B. Negatively geotrophic
• C. positively photootrophic
• D. negatively gravitrophic

Answer 1

The correct option is A positively geotrophic

The roots are exhibiting positive geotropism, or growth with gravity, while the stem is exhibiting negative geotropism, or growth against gravity.

Different parts of a plant grow in opposite directions because they have different functions. The roots need to grow into the ground to provide stability for the plant, as well as to access water and nutrients. The stem needs to grow upward toward the sunlight so the plant canphotosynthesize, or make food from sunlight.

So, the correct option is 'Positively geotrophic'.