英文字典中文字典


英文字典中文字典51ZiDian.com



中文字典辞典   英文字典 a   b   c   d   e   f   g   h   i   j   k   l   m   n   o   p   q   r   s   t   u   v   w   x   y   z       







请输入英文单字，中文词皆可：


请选择你想看的字典辞典：
单词字典翻译
elgr查看　elgr　在百度字典中的解释百度英翻中〔查看〕
elgr查看　elgr　在Google字典中的解释Google英翻中〔查看〕
elgr查看　elgr　在Yahoo字典中的解释Yahoo英翻中〔查看〕

安装中文字典英文字典查询工具!


中文字典英文字典工具:
选择颜色:
输入中英文单字

































































英文字典中文字典相关资料:


  • BIOB 101: Chpt. 13 Questions Flashcards - Quizlet
    scientists have identified over 1 5 million different species, but at least 10 million, and possibly over 100 million, different species might exist on Earth today plants experienced an adaptive radiation after the evolution of the flower
  • How many species are there? - Our World in Data
    One of the most widely cited figures comes from Camilo Mora and colleagues; they estimated that there are around 8 7 million species on Earth today 4 Costello et al (2013) estimate 5 ± 3 million species; Chapman (2009) estimate 11 million; and after reviewing the range in the literature, Scheffers et al (2012) choose not to give a concrete
  • Number of Species on Earth - Current Results
    The greatest species diversity exists among insects, which account for about one million of the earth's species known to science Mammals make up one of the smallest groups, with just 5,513 members Altogether the earth's oceans, lakes, continents and islands support over 66,000 identified species of vertebrate animals and more than 307,000
  • How many species are there on Earth? Progress and problems - PLOS
    They found 1 1 million putative species, after excluding a remarkable 9 5 million potential species each represented by a single sequence These putative species were mostly Ascomycota (57%; yeasts and relatives) and Basidiomycota (37%; mushrooms and relatives) They extrapolated from this sampling to conservatively project 6 3 million fungal
  • How Many Species Are There on Earth and in the Ocean?
    Our current estimate of ∼8 7 million species narrows the range of 3 to 100 million species suggested by taxonomic experts and it suggests that after 250 years of taxonomic classification only a small fraction of species on Earth (∼14%) and in the ocean (∼9%) have been indexed in a central database Closing this knowledge gap may still
  • Global biodiversity - Wikipedia
    Insects make up the vast majority of animal species [14]Chapman, 2005 and 2009 [9] has attempted to compile perhaps the most comprehensive recent statistics on numbers of extant species, drawing on a range of published and unpublished sources, and has come up with a figure of approximately 1 9 million estimated described taxa, as against possibly a total of between 11 and 12 million
  • How Many Species Are On Earth? - WorldAtlas
    Thus, the exact number of species found in the world remains unknown Over the years, with the advancement of scientific knowledge and the discovery of more new species, it has been approximated that there are, at present, 10 million to 14 million species on Earth, of which 1 2 million species have been databased
  • Biodiversity - Education | National Geographic Society
    Generally, the closer a region is to the Equator, the greater the biodiversity At least 40,000 different plant species live in the Amazon Rainforest of South America, one of the most biologically diverse regions on the planet By contrast, only around 600 plant species live on the Antarctic continent and in its lakes
  • How many species are we losing? | WWF
    These experts calculate that between 0 01 and 0 1% of all species will become extinct each year If the low estimate of the number of species out there is true - i e that there are around 2 million different species on our planet** - then that means between 200 and 2,000 extinctions occur every year
  • How Many Plants And Animals Are There On Earth | Science . . .
    The different statistical models over the years have been gradually homing in on a figure of 8 7 million total species Currently, 1 64 million have been named, so that’s 81 per cent left to find (the 86 per cent figure was based on 2011 totals) This only covers eukaryotes (animals, plants and fungi) though
  • Number of species on Earth tagged at 8. 7 million | Nature
    There are 8 7 million eukaryotic species on our planet — give or take 1 3 million The latest biodiversity estimate, based on a new method of prediction, dramatically narrows the range of 'best
  • How Many Species Exist? - National Wildlife Federation
    But more than 200 years after biologists began naming and classifying the world´s plants and animals, they still do not know how many species exist Estimates range from 3 million to 100 million or even more Taxonomists--biologists who specialize in identifying and classifying life on the planet--have named approximately 1 7 million species
  • 28 Facts About Biodiversity - TRVST
    The Earth is home to different species and communities of species Biodiversity is unique in all parts of the Earth As the environmental conditions change from what millions of species adapted to, many are under the threat of extinction Every species is valuable and in need of protection These 26 biodiversity facts point out interesting aspects of our Earth’s biosystem alongside the
  • Total Number of Species Estimated in the World
    The world's species encompass nearly four hundred thousand plants Most plant species are flowering plants, classified as angiosperms Least numerous are the vertebrate animals (mammals, birds, reptiles, amphibians and fish) which number eighty thousand Of these, mammals account for the fewest species, totalling just 5,500
  • A new estimate of biodiversity on Earth | ScienceDaily
    To date, about 1 5 million species have been formally described in the scientific literature, most of them insects Proportionally, bacteria comprise less than 1% of all described species





中文字典-英文字典  2005-2009