Soil moisture is the independent variable. True The proportion of individuals is the dependent variable. True Species B and Species C have a similar average tolerance for soil moisture. False Species C tolerates a broader range of soil moisture than species B. True Species C is more likely to live in a desert than Species A. False

During crossing-over, a. genetic material is exchanged between nonsister chromatids, resulting in new combinations of alleles. b. nonsister chromatids from each homologous chromosome of a tetrad are exchanged, resulting in new combinations of alleles. c. one homologous chromosome of a tetrad is exchanged with another tetrad, resulting in new combinations of alleles. d. sister chromatids from each homologous chromosome of a tetrad are exchanged, resulting in new combinations of alleles. e. genetic material is exchanged between sister chromatids, resulting in new combinations of alleles.