Answer: False
Explanation:
It's the opposite! Hot, less material rises while the cold, more dense material sinks
Answer - A. Will slowdown or stop working
Reason - every enzymes has a specific ph level but if it's out it's range then it won't be able to adapt and will eventually stop working. Like I said enzymes have specific needs in order to be able to function properly.
Answer:
Dorsal lol, its contracts and pumps blood to the aortic arches.
