animals that give birth to live young and have hair or fur D. animals that live in the water 相关知识点: 试题来源: 解析 C。“mammals”的意思是哺乳动物。选项 A 是产卵的动物;选项 B 是有羽毛的动物;选项 D 是生活在水里的动物。哺乳动物是胎生且有毛发或皮毛的动物,所以选 C。反馈 收藏 ...
What advantages do reptiles have over amphibians? How can amphibians protect themselves? How can you tell a reptile from an amphibian? What kind of fertilization do amphibians have? What organs do amphibians use to breathe? What types of vertebrates existed before amphibians?
What organs do amphibians use to breathe? How do amphibians digest food? Do amphibians eat plankton? How do amphibians get their food? What is an amphibian that lives in the savanna? What is a living fossil between fish and amphibians?
It allows them to maintain an underwater aquatic lifestyle well after their juvenile stage is finished (though they do have lungs as well as gills to breathe air). But perhaps their most unusual and fascinating trait is that they have the ability to regenerate entire limbs, lungs, hearts,...
Humans cannot breathe underwater because our lungs do not have enough surface area to absorb enough oxygen from water, and the lining in our lungs is adapted to handle air rather than water. However, there have been experiments with humans breathing other liquids, like fluorocarbons. Fluorocarbon...
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How do hippos breathe when in water? As mammals, hippos have lungs just like we do. Lungs aren’t much use under water, to the point of being a liability. Water is dense and viscous, so it takes a lot of effort to pump it in and out of internal inflatable bags. Too much effort,...
Zoom Sharks is a comprehensive on-line hypertext book about sharks. It is designed for people of all ages and levels of comprehension. It has an easy-to-use structure that allows readers to start at a basic level on each topic, and then to progress to
In some areas, especially where introduced, rabbits can be considered pests due to their impact on vegetation and agriculture. 3 Are frogs social animals? Frogs can be seen gathering in large numbers during breeding seasons, but they do not form social bonds like mammals. 1 Can frogs survive ...
Do sharks give birth to live young like dolphins? As mammals, dolphins give birth to live young, which they feed and nurture for extended periods. Some sharks can give birth in a similar way to mammals, while other species lay eggs – some hatching within the mother’s body, while others...