How genes control many of the characteristics of the organisms? answer asap pls

In this experiment, the was intentionally manipulated. it is the independent variable. the dependent variables that were measured were the

Which statement best describes a typical difference that could be found between the “analysis” and “conclusion” sections of a lab report?

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.