百度试题 结果1 题目Dolphins are ___. A. insects B. mammals C. reptiles D. amphibians 相关知识点: 试题来源: 解析 B。海豚是哺乳动物,选项 A“insects”是昆虫;选项 C“reptiles”是爬行动物;选项 D“amphibians”是两栖动物。反馈 收藏
百度试题 结果1 题目Dolphins are ___. A. mammals B. reptiles C. amphibians D. birds 相关知识点: 试题来源: 解析 A。海豚是水生哺乳动物,通过胎生繁殖后代。反馈 收藏
Are aquatic turtles reptiles or amphibians? Are amphibians and reptiles mammals? Is a turtle a reptile, amphibian or mammal? Are tortoises reptiles or amphibians? Is a hawksbill turtle an amphibian? Are fish mammals or amphibians? Are turtles in the phylum Chordata?
Are crabs invertebrates or vertebrates? Are dolphins invertebrates or vertebrates? Do eels have backbones? Is a sea urchin nekton? Are amphibians invertebrates or vertebrates? Is a sea urchin a vertebrate or invertebrate? Are monotremes invertebrates?
Mammals are distinct frombirds,reptiles,amphibians,fish, andinvertebratesin three key ways. First, all mammals have fur or hair. In some species this presents as a very conspicuous, thick coat, whereas in others it may be less obvious.Dolphins, for example, are marine mammals and they are no...
whales(Mysticeti, humpback whales, and rorquals). Toothed cetaceans have teeth and eat penguins, fish, and seals. Instead of teeth,Mysticetihave a shelf of bony material called baleen that filters tiny prey like zooplankton out of ocean water. All cetaceans, toothed or baleen, are mammals. ...
All mammals have some form of hair or fur during some period of their life. Some, like dogs and cats, are covered in fur throughout their life. Others, such as dolphins, have a light covering of hair early in development. Hair can provide camouflage, protection from the weather, and aid...
Are dolphins and porpoises whales? These marine mammals have many things in common. Whales, dolphins, and porpoises all fall under the ordercetacea. Within this order, there are two suborders, the Mysticeti, orbaleenwhales, and the odontoceti, ortoothed whales, which includes dolphins and porpoi...
Are deer vertebrates or invertebrates? Our list of vertebrate animals can be categorized into 5 main groups: Mammals, birds, fish, amphibians, and reptiles. The following are examples of vertebrate animals, some of them given by their generic names. E.g. when we say “deer”, we mean that...
aEarth surface waters are filled with life. The earliest life forms appeared in water; nearly all fish live exclusively in water, and there are many types of marine mammals, such as dolphins and whales. Some kinds of animals, such as amphibians, spend portions of their lives in water and ...