Explanation:
Carrier proteins are proteins that carry substances from one side of a biological membrane to the other.
Mammals. I am no scientist, but I think that they are closer to mammals due to the fact that they are warm-blooded, and they raise their young. Reptiles are cold blooded and usually leave their offspring to fend for themselves.
Pure water freezes at 32 degrees Fahrenheit, and at 0 degrees Celsius.
Hope this helps!
A prokayrotic cell has no nucleus