How do enzymes affect the activation energy of a reaction

What best describes the dropping height of a ball that bounces back up to a height of 45 cm

What are they five steps of cloning?

Which of the following statements is true about the relationship between genetic variation and natural selection? a. genetic variation must be present in a population before natural selection can act on it. b. genetic variation arises in a population as a result of natural selection. c. natural selection can act on a population whether there is genetic variation within the population or not. d. after natural selection acts on a population, the amount of genetic variation in the population always increases.