As for this problem, the most probable answer and the most likely answer for this one would be D. the effect of pesticides on organisms in the environment.
A toxicologist would only study about chemicals and their effect on organisms in the environment. Pesticides are chemicals made to combat organisms that aren't wanted particular parts of the environment such as crops and rice field. These pesticides don't just affect those organisms that are targeted, but even the users and other organisms that may have come in contact with pesticides.
Answer:
c. the offspring are genetically different from either of the parent plant.
Explanation:
The plant has it's own DNA that comes from both parents. The pink is a result of a mixture between the red and white.
Answer: D
They often occur spontaneously, because when energy is released during a chemical reaction it does not usually happen slowly.