Tuesday, February 13, 2024
问题:唇形科的雄蕊类型为()A、单体雄蕊B、聚药雄蕊C、二强雄蕊D、四强雄蕊
Sunday, October 9, 2022
问题:种子由种皮、胚、()三部分组成,是由胚珠受精后发育而成。
Saturday, September 17, 2022
Saturday, September 17, 2022
Sunday, October 9, 2022
Monday, February 19, 2024
问题:英国人RobertHooke首次观察到的细胞是植物的()A、薄壁细胞B、石细胞C、木栓细胞D、纤维细胞
Saturday, September 17, 2022
Wednesday, August 2, 2023
问题:木瓜来自()。A、蔷薇科B、葫芦科C、十字花科D、桃金娘科
Tuesday, September 13, 2022
Tuesday, March 5, 2024
Saturday, October 15, 2022
问题:韭菜割掉一茬后,很快会再长起来,这是由于韭菜叶片中具有()的缘故。
Saturday, September 17, 2022
问题:花中雌蕊由1枚心皮组成,胎座着生于腹缝线上,这种胎座为()。A、侧膜胎座B、边缘胎座C、基生胎座D、中轴胎座
Wednesday, August 9, 2023
Tuesday, September 13, 2022
Saturday, September 17, 2022
Wednesday, August 9, 2023
Saturday, April 27, 2024
问题:主根是从()发育而来的。A、直根系B、胚根C、定根D、不定根
Saturday, September 17, 2022
问题:双子叶植物根茎的构造特点为()A、表面通常为木栓组织B、皮层中有根迹维管束C、皮层中有叶迹维管柬D、贮藏薄壁组织发达E、机械组织发达
Saturday, September 17, 2022
Monday, November 21, 2022