天气预报 > 其他 > 田螺是怎样产子的
田螺是怎样产子的
更新时间: 2020-10-10 00:00:00  

田螺是雌雄异体的动物,需要经过交配才能繁殖后代;田螺属于卵胎生动物,田螺的胚胎发育和仔螺发育均在母体内完成;从受精卵到仔螺的产生,大约需要在母体内孕育一年时间;田螺为分批产卵,每年3月至4月开始繁殖,在产出仔螺的同时,雌、雄亲螺交配受精,同时又在母体内孕育次年要生产的仔螺。

关键词: 田螺 怎样 产子

田螺是怎样产子的相关经验

天气预报

最新推荐

页面:/news/view-1542248/ | 耗时:0.3459 s | 内存:2.11 MB | 查询:4 | 缓存读取:3 写入:0 | 加载文件:25
select * from tbl_Articles WHERE ArticleID=1542248 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=1542248 LIMIT 0,1
select * from tbl_Articles_sphinx where id=1542248 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(2666365,1062716,3275185,1063559,1068006,1125968,1048474,1049728,1101629,1125329,1109925,1066020,1054358,982771,1070993,1062866,1042943,1067795,1068558,1066526,1052415,1123555,1100667,1074923,1275296,1055678,1046402,1128008,1052699,1065683) ORDER BY field (ArticleID,2666365,1062716,3275185,1063559,1068006,1125968,1048474,1049728,1101629,1125329,1109925,1066020,1054358,982771,1070993,1062866,1042943,1067795,1068558,1066526,1052415,1123555,1100667,1074923,1275296,1055678,1046402,1128008,1052699,1065683)