The phylum 'chordata' includes all species that have spinal chords, also knowns as vertebrates. Within a phylum, there are classes of species. Within chordata, there are many classes. Two of those well known classes are mammals and amphibians.Answer and Explanation: There are many taxonomic and...
It would be correct to say that mammals are a group of animals with backbones, whose bodies are insulated by hair, which nurse their infants with milk and which share a unique jaw articulation. This, however, fails to convey how these shared characteristics underpin the evolution of a group ...
While broadly recognized for their convergent thermoregulatory, camouflage and sexual display functions, hairs and feathers are rarely thought of as deadly defence tools. Several recent studies, however, show that in some species of mammals and birds, the integument can, in fact, be a de facto ...
Other animals of the forest include two varieties of arborealsloths, three types ofanteaters, armadillos, andiguanas, the last especially prized for their flesh. Amongsnakesthe nonpoisonousboaconstrictor andanacondaare notable for their size, the latter reaching lengths up to 30 feet (9 metres)....
poisonous 有毒的;C. delicate精致的;D. cautions谨慎;根据常识可知,鲸鱼属于大型哺乳动物,故选A。 22. 【答案】C 【解析】句意:尽管虎鲸处于海洋食物链的顶端,但它们的生命受到了极大的威胁。A. refreshed 使重新提起精神; B. discovered 发现;C. threatened 威胁; D. witnessed目睹;...
They also have a tail like that of beavers. The platypus uses its tail to swim in water and search for food, which includes various insects and fishes. Platypuses are pretty poisonous as well and they use this poison to protect themselves against the attackers. ...
“When more people show concern for the ocean, we are, in fact, acting for our own benefit,” he said.1. What can we learn about the new species of box jellyfish? A.It is the most poisonous. B.It was found accidentally. C.It is the first discovery in China.2. What does the ...
“meat-eating” plants can’t. They live in places where nutrients are hard or almost impossible to get from the soil because of its acidity. So they’ve come to rely on getting nitrogen from insects and small animals. In fact, nutrient-rich soil is poisonous to “meat-eating” plants....
the paucity of grazing animals meant that plants developed no defenses, such as spines, poisonous chemicals, or bitterness.The remoter islands had a very high proportion of endemism—that is,of species that existed only there.In the case of Hawaii, as many as 99 percent of the species were ...
Some insects use bright, bold colors to send warning signals that they taste bad, sting or are poisonous. Others have wing patterns that look like the eyes of a huge predator, confusing their enemies. Some insects also imitate bitter-tasting insects; hungry enemies are fooled into avoiding ...