I have a cis face to receive vesicles containing proteins from a near by organelle. I then repackage secretory proteins and ship them out of my trans face to their final destination. What am I? -Golgi apparatus
-Nucleolus
-Vacuole
-Ribosome
-Smooth ER
-Rough ER
-Lysosome

Which of the following statements is true about the relationship between genetic variation and natural selection? a. genetic variation must be present in a population before natural selection can act on it. b. genetic variation arises in a population as a result of natural selection. c. natural selection can act on a population whether there is genetic variation within the population or not. d. after natural selection acts on a population, the amount of genetic variation in the population always increases.