解析 A。解析:在沙漠生态系统中,仙人掌能够长时间储存水分。从语法看这是一个特殊疑问句。Cacti(仙人掌)是沙漠生态系统的典型植物,有储存水分的能力。Flowers in the forest(森林里的花朵)属于森林生态系统,Deer(鹿)是森林或者草原生态系统的动物,Birds in the grassland(草原里的鸟)属于草原生态系统。
Plants in a desert ecosystem can ___. A. save water B. waste water C. use water D. provide water 相关知识点: 试题来源: 解析 A。沙漠生态系统中的植物有一些特殊的结构可以保存水分,选项 A 正确。选项 B,植物不会浪费水;选项 C,植物不是单纯使用水;选项 D,沙漠中的植物一般不能提供大量的水。
A diverse range of adapted plants and animals D. Continuous snowfall 相关知识点: 试题来源: 解析 C。解析:一个健康的沙漠生态系统的特征是有各种各样适应沙漠环境的动植物。虽然沙漠水资源稀缺,但并非没有动物(选项A)。选项B大量的积水不符合沙漠生态系统的特点。选项D连续降雪也不符合沙漠生态系统的气候特征...
In a desert ecosystem, plants usually have special adaptations to survive. Which of the following is a common adaptation? A. Large broad leaves B. Shallow root systems C. Thick cuticles to reduce water loss D. High stomatal density 相关知识点: ...
In the desert ecosystem, which of the following is the correct food chain? A. Cactus - Sand rat - Snake B. Sand rat - Cactus - Snake C. Snake - Sand rat - Cactus D. Cactus - Snake - Sand rat 相关知识点: 试题来源: 解析 A。解析:在荒漠生态系统中,仙人掌是生产者,能够通过光合作用...
A. The number of scorpions will double immediately. B. The number of scorpions will decrease. C. The number of scorpions will first increase and then decrease. D. The number of scorpions will first decrease and then increase. 相关知识点: 试题...
解析 C。本题关于生态系统中物种多样性。选项 A“Desert”沙漠环境恶劣,物种相对较少;选项 B“Tundra”苔原生态系统条件苛刻,物种不丰富;选项 C“Rainforest”热带雨林气候适宜,物种最为多样;选项 D“Grassland”草原的物种多样性不如热带雨林。反馈 收藏
A. Desert ecosystem B. Forest ecosystem C. Grassland ecosystem D. Ocean E. cosystem 相关知识点: 试题来源: 解析 B。本题考查不同生态系统中的生物。森林生态系统中有丰富的植被,能为多种鸟类提供栖息和食物,A 选项沙漠生态系统生物种类相对较少;C 选项草原生态系统鸟类相对较少;D 选项海洋生态系统中鸟类...
In a desert ecosystem, cacti play an important role. If the number of cacti decreases, which of the following is most likely to happen? A. 离件东斯少总还万月众报内打就个离件东斯少总还万月众报内打就个The desert will become greener离件东斯少总还万月众报内打就个离件东斯少总还万月众...
Climate change poses a threat to the desert ecosystem by ___. A. reducing rainfall. B. increasing desertification. C. causing floods. D. destroying habitats. 相关知识点: 试题来源: 解析 B。中文解析:气候变化通过增加沙漠化对沙漠生态系统构成威胁。反馈...