25. In the life cycle of a bread mold, the stage in which diploid nuclei occur is (A) the gametangium. (B)the aseptate hypha. (C)the asexual spores. (D)the sporangium. (E) the zygosporangium.

21. The evolution of organisms that use oxygen in their respiration was possible only because of the action of a group of bacteria that produced oxygen and changed the Earth's atmosphere from an anoxic one to one rich in oxygen. That group of bacteria was: (A) actinobacteria (B)spirochaetes (C)proteobacteria (D)Staphylococcus (E) cyanobacteria

25. In the life cycle of a bread mold, the stage in which diploid nuclei occur is (A) the gametangium. (B)the aseptate hypha. (C)the asexual spores. (D)the sporangium. (E) the zygosporangium.

其他試題

25. In the life cycle of a bread mold, the stage in which diploid nuclei occur is
(A) the gametangium.
(B)the aseptate hypha.
(C)the asexual spores.
(D)the sporangium.
(E) the zygosporangium.