If you want to prevent a grass seedling shoot from bending toward light, you should ____.
A) remove the shoot tip
B) place a translucent cap on the shoot tip
C) place an opaque cap on the shoot tip
D) either remove the shoot tip or place a translucent cap on the shoot tip
E) either remove the shoot tip or place an opaque cap on the shoot tip

Question

Quizplus · Accepted Answer

Grass seedling shoots bend toward light due to phototropism, which is directed by the shoot tip's perception of light. Removing the shoot tip or covering it with an opaque cap would prevent it from sensing light, thus stopping the bending toward light. A translucent cap would still allow light to reach the shoot tip, not preventing the phototropic response.

If You Want to Prevent a Grass Seedling Shoot from Bending