Answer:
ethanol.acetone and butanol
The answer is in the picture. I hope this helps you.
D identical. thats what replication is. making exact copies
Awnser:
Arteries
Explanation:
Arteries have a higher amount of elastin than veins. Thus, veins have a higher ratio of collagen to elastin thsn do arteries
The answer is methods of observation. Observational Methods in mental research involve the perception and portrayal of a subject's conduct. Scientists using the observational technique can apply fluctuating measures of control over the earth in which the perception happens.