I think the answer is due to ph. levels in the soil
It attaches to chromosomes to split them into two identical sets. This allows the cell to reproduce exact copies of itself (assuming we don’t have nondisjunction!)
Answer: <u><em>D. An observation that has a number associated with it</em></u>
Explanation: The answer is D. An observation that has a number associated with it. I would explain further, but it is pretty self explanatory.
<em>Good luck!</em>