Epithelial cells must be able to divide rapidly because they are found in organs such as the heart that are constantly moving, and therefore, quickly wear out
are found in tissues that are frequently exposed to abrasion, such as the skin and digestive tract
compose the brain, which is continually altered as we learn new things
compose the blood, which needs to be replenished quickly after injury

The images show the wings of a bat and a bee. from this evidence, what can you conclude about the evolutionary relationship between these organisms? a. the wing structures of the bat and the bee are different, indicating they didn’t inherit wings from a common ancestor. b. the wing structures of the bat and the bee are different, indicating they inherited wings from a common ancestor. c. the functions of bat wings and bee wings are the same, indicating they obtained wings from a common ancestor. d. the functions of bat wings and bee wings are different, indicating they didn’t obtain wings from a common ancestor.

Imagine ? person stepping on a pin and pulling his or her foot way look at the réfléchir arc of the scenarios below

If the coding part of an mrna molecule is 1800 nucleotides (bases) in length, this molecule will contain codons and code for a polypeptide that is amino acids long.