下列植物的器官中，藻类植物、苔藓植物和蕨类植物都不具有的是（　　）

Mr. Smith gave his wife money every Friday evening. His wife always spent it all the next Wednesday, so that for the next three days she had no money to spend at all. One day Mr. Smith asked her, “But how did you spend all that money?” She answered, “I don’t know.” So one Friday evening, Mr. Smith gave her money together with an exercise book and a pencil. He said to his wife, “Please write down how you spend the money.” Next Tuesday, his wife had no money again. Mr. Smith took the exercise book to see how she had spent it. “I have done what you told me,” she said gladly. She had written “Friday, I got 18 pounds from Mr. Smith.” on the first page, and on the second page, she wrote, “Tuesday, I have spent it all.”

已知四倍体西瓜的一个染色体组含有11条染色体；又知普通小麦是含有6个染色体组的生物，它的每个染色体组均含有7条染色体。四倍体西瓜是用秋水仙素处理二倍体西瓜幼苗形成的，普通小麦是由三个物种先后杂交并经染色体加倍形成的。若将体细胞中的染色体按其形态、大小、结构进行归类，则（ ）