Rashad is using the setup below to investigate how pH affects the rate of reaction when amylase breaks down starch Who is the independent variable in this investigation?

What would be the result if crossing over did not happen during meiosis in humans? a. there would be less genetic variation in humans. b. parents would be more likely to look like their children. c. the human population could not reproduce. d. children would have more chromosomes.

Which statement describes john tuzo wilson’s contribution to the theory of plate tectonics?

Acell goes through cellular respiration and produces atp which it then uses to move a molecule across the cell membrane. how does the energy in the original glucose molecule change during this process? (2 points)