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 portions on land. Plants such as [translate]...
【题目】Many types of birds , insects , marine mammals , fish and large mammals migrate each year.T he principal reasons for this areto reach suitable places for breeding , and to obtain better conditions for food , water and temperature.Some examples of migration for reproduction are: fish ...
Regardless of whether innate or learned, call types that persist in the repertoire over lifetimes and/or generations, and are shared among allopatric groups and contexts, likely serve an important function. In addition, call types of marine mammals that are fixed and ubiquitous would be ideal cand...
Marines may be examined the margins between the ocean and land or between the oceans in which are case they may be treated as marginal parts of either. There is no unique eventual authority on the matter. However, some categories are such as mammals, birds, spiders, and oligochaetes, are ...
The 3 Basic Types Of Mammals There are 3 main groups of animal: monotreme (egg-laying), marsupial (pouched) and placental (young develop in the womb) As we found in theprevious parts of this seriesthere are three main types of mammal: monotremes, marsupials, and placental mammals. ...
whaling led to severe depletion of some populations. Within the last half century, recognition of this fact, combined with insights into the intelligence of marine mammals, has led to the emergence of protection and appreciation as the primary interactions between humans and marine mammals. ...
studying the new bacteria, which were little known to researchers in the past, scientists may develop new insights into bacterial diversity, dolphin health and the unique nature of marine mammals in general, said David Relman, professor of microbiology and immunology at the Stanford School of ...
in the northern and southern hemisphere’s temperate and cold waters while inhabiting open and coastal waters. Porbeagle sharks do not prey on marine mammals, unlike their white shark family relatives. The white patch at the rear end of the dorsal fin is the identifiable feature of this shark....
A. a kind of invertebrates < br>B. a kind of marine mammals< br>C. a kind of colonial plants < br> D. a kind of aquatic vertebrates 点击查看答案&解析进入在线模考 填空题 Complete the gap-filling task. Some of the gaps below may require a maximum of THREE words. Make sure the wor...
The only type of sea turtle that has a soft shell, rather than a hard shell, is the leatherback sea turtle. Because leatherback sea turtles are bigger in size, their risk of danger is considerably low in comparison to other types of sea turtles. Learn more about the trials and tribulations...