A student wants to determine the effect of soil type on plant growth. He sets up three pots as shown below. How could this experiment be improved?

B

Explanation:

B is the correct answer. This ensures that all other conditions remain constant and therefore ensures that it really is the effect of soil types that you're testing.

Hope this helps!!! :)

small, big, or no change could occur in the phenotype. it could cause something as simple as a cats ears to curl backwards or something as frighting as death. it could also occur in the protien-coding area and have an effect on that but no effect on the amino acids. what has to occur is a changing in the hox gene or the control gene.