NEET UG BIOLOGY MCQ: PLANT KINGDOM

Option B (80) is correct because in both angiosperms and gymnosperms, each zygote requires one egg and one sperm, and each egg and sperm requires one meiosis. For 64 zygotes, 64 eggs and 64 sperms are needed, thus 64 + 16 = 80 meiosis in angiosperms (64 for eggs, 16 for pollen grains) and 64 + 64 = 128 meiosis in gymnosperms (64 for eggs, 64 for pollen grains). However, the question asks only about the number of meiosis for the formation of 64 zygotes, which is 64 for eggs and 16 for pollen grains in angiosperms and 64 for eggs and 16 for pollen grains in gymnosperms. Therefore, the number of meiosis for the formation of 64 zygotes is 80 in angiosperms and 80 in gymnosperms.