What enzyme found in saliva breaks chemical bonds between the between the sugar monomers in starches

What is thought to have caused the mass extinction at the end of the cretaceous period?

The image shows the evolution of a species of fish. a few fish from a population developed different social behaviors and evolved into different species. two fish according to the image, the fish underwent . the new species of fish had mating seasons that were different from that of the original fish. because of the differences in mating seasons, the fish underwent reproductive isolation. this mode of isolation would be .

10. in which phase will crossing-over occur? a. mitosis b. metaphase ii c. prophase i d. meiosis ii