What happens in chemosynthesis? a. certain microorganisms in hydrothermal vents use chemical energy to create organic molecules from inorganic nutrients. b. certain microorganisms in hydrothermal vents use light energy to create organic molecules from inorganic nutrients. c. limited by a lack of inorganic nutrients, certain microorganisms die while creating organic energy molecules.

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.