The model shows the relation between the reaction velocity of an enzyme and temperature. Which of these is a description of the relation? Select one:
a. Reaction velocity always increases with an increase in temperature.
b. Reaction velocity remains constant with an increase in temperature.
c. Reaction velocity increases up to a certain temperature before decreasing.
d. Reaction velocity decreases with an increase in temperature.

Sarah and john are having a discussion on genetic diversity. sarah believes that it happen over a long period of time. john it happens immediately. who is correct? a. sarah is correct because genetic diversity occurs over a long period of time. b. john is correct because genetic diversity occurs immediately. c. both are correct because genetic variation can occur or long period of time. d. neither are correct because genetic diversity occurs over any period of time

In many humans, exposing the skin to sunlight over prolonged periods of time results in the production of more pigment by the skin cells (tanning). this change in skin color provides evidence that -

Natural resources are any materials that humans obtain from the earth to meet our wants and needs.