How do the cells in a fish react when moving from saltwater to freshwater?
a. the cell fills with water
b. the cell fills with salt
c. the cell forms stem cells
d. the cell uses exocytosis

Which of these is not an example of molecular homology? 1. use of dna and rna as genetic material 2.use of glycolysis as the first step in cellular respiration in both plants and animals 3. the lack of an igf-1 gene in prokaryotes 4. the use of aldolase b to break down fructose in bacteria, plants and animals