Answer:
It just seems like you're supposed to give four pieces of evidence of natural selection. If you're still confused, you can always ask your teacher.
Explanation:
RNA viruses can copy themselves which is harder for scientists to give an accurate conclusion to solve them.
Answer:
Light, minerals, and things from the periodic table!!
Explanation:
Answer is D.
Waste products from metabolism are carried by the circulation to the kidneys, which filter them out if the blood to be excreted in urine.
