Which of the following is found in eukaryotic cells but not in prokaryotic cells?

a nucleus
b mitochondria
c endoplasmic reticulum
d lysosomes
e all of the choices are correct

How many variables are altered in a good experiment? a.1 b.0 c.2 d.3

Most animal cell membranes have proteins that pump. ions out of the cell and potassium ions into this

Amino acids contain the elements carbon, hydrogen, oxygen, nitrogen, and sometimes sulfur. of the 20 amino acids found in humans, 11 are called "nonessential" because they can be manufactured by the body when needed. which elements in these 11 amino acids are commonly obtained from the metabolism of sugar molecules?