Which two structures are found only in plant cells?
a) vacuoles and ribosomes
b) chloroplasts and ribosomes
c) cell walls and chloroplasts
d) endoplasmic reticulum and cell walls
btw its not (b)

Many animals cannot sweat to maintain a stable body temperature. what is one other way animals can cool down?

Did the vinegar diffuse all the way to the center of any of the cubes? if so, which ones? what does this tell you about surface area-to-volume ratio and the diffusion rate?

Which of these is true of the cytoplasm of an unfertilized egg? a. it is an unevenly distributed mixture of mrna, proteins, organelles, and other substances. b. it does not contain substances that are important in directing development. c. these substances are supplied by the sperm. d. it does not contain substances that are important in directing development. e. development is directed solely by the surrounding cells. f. it is a homogeneous mixture of mrna, proteins, organelles, and other substances. g. it does not contain substances that are important in directing development. h. these substances are produced by the dna of the fertilized zygote.