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更多“物种分布区 species distribution ran…”相关的问题
A.资源严重减少的主要常用野生药材物种
B.资源处于衰竭状态的名贵野生药材物种
C.濒临灭绝状态的稀有珍贵野生药材物种
D.分布区城缩小、资源处于衰竭状态的重要野生药材物种
Paychecks______.
A．are twice distributed a month
B．twice a month are distributed
C．are distributed twice a month
D．a month are distributed twice
下列事例中，属于外来物种入侵的是：
A.院外的竹子生长进入了院内，给院内环境造成了影响
B.在自家小院鱼池中放养的水葫芦繁殖得很快，一些鱼因缺氧而死
C. 从国外引入的八哥在野外自然繁衍，已经在北京形成了自然种群
D.二战期间．棕树蛇被一艘军用货船带至关岛，这种栖息在树上的爬行动物专门捕食鸟类，偷袭鸟巢，吞噬鸟蛋，致使当地一些鸟类绝种
根据以下材料，回答题
The Book of Life
So far， scientists have named about 1.8 million living species （物种）， and that"s just a small part of what probably exists on Earth. With so many plants， animals， and other creatures covering the planet， it can be tough to figure out what type of spider is moving up your leg or what kind of bird is flying by.
A soon-to-be-launched Web site might help. An international team of researchers has announced the creation of a Web-based Encyclopedia （百科全书） of Life （EoL）. The project aims to catalog every species on Earth in a single， easy-to-use reference guide.
To get the encyclopedia started， the creators will use information from scientific databases （数据库） that already exist. And eventually， in special sections of the site， nonscientists with specialized（专门的 ）knowledge will get to join in. Bird-watchers， for example， will be able to input which birds they"ve seen and where. The technology for this kind of tool has only recently become available.
As the EoL develops， you might find it useful for school projects. The site will feature special pages for kids who are studying ecosystems （生态系统） in their neighborhoods. To make sure the encyclopedia is accurate， scientists will review much of the information added to it. People who visit the site will be able to choose to leave out pages that haven"t been reviewed.
Another convenient feature of the EoL is that you"ll be able to pick the level of detail you see to match your interests， age， and current knowledge. If you wanted to learn about bears for a science class report， for example， you could use the "novice" setting to get basic information about the animals. On the "expert" setting， on the other hand， you could get much more detailed information about the history， literature， and exploration of bears.
It now takes years for scientists to collect all the data they need to describe and analyze species. The creators of the Encyclopedia of Life hope that their new tool will speed that process.
"Spider" and "bird" mentioned in Paragraph 1 are examples to illustrate __________. 查看材料
A.animals are people"s friends
B.there are numerous living species on Earth
C.it is easy to see spiders and birds
D.there are many types of spiders and birds
Part science and part natural history, ornithology(鸟类学) owes its tremendous popularity as a science and a scientific recreation to a simple circumstance that is sometimes forgotten when we weigh the eligibility(有被选资格，合适)of different kinds of animals for informal study. Birds are day animals where others, just as engaging in their way—mice, for instance—are creatures of the night. Apart from their visibility (something very much in their favor), the beauty of birds and their many appealing habits have won for them a huge fan following that has more than once tempted impatient and ill-informed laboratory biologists to dismiss ornithology as so much bird-watching—an absurdly unjust judgment that ignores the fact that ornithology has made a number of profoundly important contributions to general biology.
Professional biologists are not hard put to reel off(滔滔不绝地讲) a list of distinctive contributions that ornithology has made to general biology science. They will cite, for example, Ernst Mayr's investigations of evolution and the mechanisms of speciation (物种形成), or M. R. Irwin's work on the immunologic performance of species of Columbidae(pigeons and doves) and of hybrids(杂交种)between them. Then again, David Lack's studies on mortality in wild populations of birds are the most illuminating life tables of wild animals and animal demography (统计学) generally. Most important of all, perhaps is the contribution that ornithology has made to the study of animal behavior, beginning with Julian Huxley' s classic study of the courtship habits of the great crested great and followed by Niko Tinbergen's studies on the behavior. of herring gulls.
What is the main idea of the passage？
A．Birds are widely studied because they are popular in the home.
B．Ornithology has made important contributions to biology.
C．Professional biologists often engage in bird-watching for recreation.
D．Animal behavior. is best studied by observing birds.
