B. Soil Contamination
All the other answers are talking about clean and pure things while this answer is the only negative one. So B is your answer.
Answer:
Derived traits shared among the species or other groups in a dataset are key to helping us build trees. As shown above, shared derived traits tend to form nested patterns that provide information about when branching events occurred in the evolution of the species.
Explanation:
I hope this helps
Answer:
Ultrasound imaging will be suitable for this.
A karyotype shows the _46_ chromosomes sorted and isolated from a cell in _Metaphase_