Question

2 researchers noted that when weeds A and B grow next to each other, the roots of Weed A stop growing when they enter the root zone of weed B. Since activated charcoal is known to absorb organic compounds, the researchers apply activated charcoal to the soil around weed B. They noted that the roots of weed A then grow into the root zone of weed B. What is true?

A. weed A absorbs activated charcoal, which enhances roots growth for weed A.
B. weed B grows best in soil that contains few organic compounds.
C. weed A is attracted to soil that contain activated charcoal.
D. Weed B produces an organic compound that inhibits roots growth for weed A

Answer 1

The roots of weed A stop growing when they enter the root zone of weed B. However, when activated charcoal is applied to the soil around weed B, the roots of weed A are able to grow into the root zone of weed B. This suggests that weed B produces an organic compound that inhibits the growth of weed A's roots.

Step-by-step explanation:

The researchers observed that the roots of weed A stop growing when they enter the root zone of weed B. However, when activated charcoal is applied to the soil around weed B, the roots of weed A are able to grow into the root zone of weed B. This suggests that weed B produces an organic compound that inhibits the growth of weed A's roots. The activated charcoal absorbs the organic compound, allowing the roots of weed A to grow freely. Therefore, option D, 'Weed B produces an organic compound that inhibits roots growth for weed A,' is true.