In terms of structure and function, how do the vacuoles in a typical plant cell compare to those of a typical animal cell?
answer
plant cell vacuoles are usually larger than animal cell vacuoles because they store both food and enzymes.
plant cell vacuoles are usually no different from those of animal cell vacuoles since they both store food.
plant cell vacuoles are usually smaller and more plentiful than animal cell vacuoles because they store both food and enzymes.
plant cell vacuoles are usually the same size as animal cell vacuoles, but they only store enzymes.

Why do leaves change color in the fall? green pigments break down and no longer mask the color of chlorophyll. chlorophyll breaks down and no longer masks the colors of other pigments. red- and yellow-colored pigments grow and mask green-colored chlorophyll. green-colored chlorophyll breaks down and turns red and yellow.

What is the major difference between a virus and a viroid?

The hershey and chase experiments involved the preparation of two different types of radioactively labeled phage. which of the following best explains why two preparations were required? a. the bacteriophage used in the experiments was a t2 phage. b. it was necessary that each of the two phage components, dna and protein, be identifiable upon recovery at the end of the experiment. c. each scientist had his own method for labeling phage, so each conducted the same experiment using a different isotope. d. establishing the identity of the genetic material required observation of two phage generations.