Enzymes are proteins that enable molecules to undergo chemical change. Hydrogen peroxide (H2O2) is a compound that is present in almost all living organisms. But hydrogen peroxide is harmful to cells. Consequently, most living organisms have an enzyme called peroxidase to protect against H2O2. Use what you have learned to explain how peroxidase behaves like an enzyme to help protect the body against H2O2. (hint: What do enzymes do?)

The afrikaners are an example of a founder effect that occurs when a new colony is started by a few members of the original population and the random decrease in genetic variation is an example of

Radiometric dating is used to tell the absolute age of materials by studying the decay rate of radioactive isotopes. the decay rates of isotopes are constant and are expressed as .

1. in a certain species of plant, the color purple (p) is dominant to the color white (p). according the punnett square, what is the probability of and offspring being white? 50%25%0%100% 2. in a certain species of plant, the color purple (p) is dominant to the color white (p). according the punnett square, what is the probability of and offspring being white? 0%100%50%25%(picture 1 is for question 1, and picture 2 is for question 2)