【题目】People used to think that mammals(哺乳动物) are the only animals to produce(产) milk for their babies. But now scientists have found one kind of spider can also nurse (哺育)its babies.Baby spiders eat almost all kinds of food, such as small worms and pollen. But onekind of ...
Bats are the only mammals(哺乳动物) that can fly a great distance, but they have another ability. Many bats live a very long time for an animal of their size. European researchers are studying bats to understand why they live so long. They hope to make discoveries aimed at fighting the ...
The reproduction of mammals is unique, as they are the only animals that produce milk. Fertilization is internal. The monotremes are exceptional among the mammals in producing shelled eggs, which they incubate. The marsupials have an abbreviated development in the uterus, while in the remaining ...
Are mammals the only animals with hair?Mammals:Mammals are one type of vertebrate animal, which means they have an internal backbone. Other characteristics of mammals are that they produce milk to feed their young, and they are warm-blooded....
The group used information that had been gathered over more than 60 years. Of these animals ,the greater mouse-eared bat generally lived the longest, an average of 37 years. The scientists said this and a related species, which are grouped together under the name Myotis, had telomeres that ...
Bats are the only mammals (哺乳动物) that can fly a great distance, but they have another ability. Many bats live a very long time for an animal of their size. European researchers are studying bats to understand why they live so long. They hope to make discoveries aimed at fighting the...
Mammals are the only animals with hair Most mammals are endothermic; they produce their own body heat. The training or learning a mammal experiences when it's young is diverged from its dependence on its mother. The ability from young mammals to learn from experience is a primary reason for ...
Blue whales are not only the largest animals in the world , they are also the loudest.These whales can produce sounds louder than a jet engine ! Whale " songs " can for miles through the water . Even though whale sounds are loud , they...
, it leaves its mother and becomes independent . song of the sea blue whales are not only the largest animals in the world , they are also the loudest.these whales can produce sounds louder than a jet engine ! whale " songs " can for mi...
Of these animals, the greater mouse-eared bats generally lived the longest, an average of 37 years. The scientists said this and a related species, which are grouped together under the name Myotis, have telomeres that do not shorten with age. One Myotis bat holds the record for the oldest...