Probably through a electron microscope either TEM or SEM. or possibly a picture through the microscope. I hope that helped.
The studies are designed this way b/c it removes the power of suggestion and the double-blind study keeps both researchers and participants in the dark. So this compared to who is receiving the treatment which is relevant b/c it stops the researchers from accidentally overbalancing the study participants, or unintentionally favoring their assessment of the conclusions.
Answer: =<u>Convergent</u> evolution
Explanation: <u>Convergent</u> evolution occurs when organisms share a trait that originated in an ancestor but changed over time in different populations.
