Scientists and engineers do different types of work. Which statement BEST compares the methods of science and engineering? a. The methods are completely different and unrelated.
b. The methods are similar, but are not identical with one another.
c. The methods are identical, but have different names.

Explain the side effects of cancer treatments

With regard to enzymes, key is to lock as a) substrate is to activation energy eliminate b) product is to substrate. c) enzyme is to active site. d) substrate is to active site.

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.