Common feature among class reptile, osteicthyes and aves is the possessing of? ps. i need the answer asap

Name the part of the the brain labeled "e".

20. in humans, freckles are dominant to no freckles. trey has no freckles and his wife anna grace has freckles, but her dad doesn't. they want to know what percentage of their kids would look like trey. show a punnett square to support your answer.

How can you tell the difference between rough er from smooth er?