Some compounds are not active carcinogens until they are converted into cancer-causing compounds in the body. To identify potential carcinogens using the Ames test, how should a compound be treated before being tested on bacteria?

The illustration shown is an ovum, a female sex cell. a mutation in this cell may be passed to the woman’s offspring during a) birth. b) mitosis. c) dna replication. d) sexual reproduction

Has regulatory areas for thirst, hunger, body temperature, water balance, and blood pressure

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.