Can someone answer this riddle worth alot and who ever can get this will get brainlist okay so if there where 10 fish and 5 drown how much is

Which of the following systems in absorbing oxygen and releases carbon dioxide

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.

How much does one sucrose molecule weigh in grams?