複選題21. Uric acid is the chief nitrogenous wasters in (A) frog (B) birds (C) fishes (D) man

10. The general purpose of the synaptonemal complex is to . (A) enable the reformation of the cell wall during cytokinensis; (B) provide a link between homologous chromosomes in meiosis; (C) separate the sister chromatids during anaphase; (D) to independently assort the chromosomes during metaphase of meiosis; (E) None of the answers are correct.