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  • Wildlife-Vehicle Collisions Are a Big and Costly Problem and . . .
    An estimated 1 million to 2 million crashes between motor vehicles and large animals such as deer occur every year in the U S , causing approximately 200 human deaths, 26,000 injuries, and at least $8 billion in property damage and other costs In rural states such as Wyoming, wildlife-vehicle crashes represent almost 20% of reported collisions
  • Genetics | The Smithsonian Institutions Human Origins Program
    A comparison of the entire genome, however, indicates that segments of DNA have also been deleted, duplicated over and over, or inserted from one part of the genome into another When these differences are counted, there is an additional 4 to 5% distinction between the human and chimpanzee genomes
  • Solved QUESTION 4 Approximately how many species have been . . .
    QUESTION 4 Approximately how many species have been identified on Earth? a little less than 1 million about 30 million about 1 5 million a little more than 10 million about 500,000 QUESTION 5 Ecological diversity is a measure of the number of different species in an ecosystem niches, trophic levels, and ecological processes of a biological community different kinds of organisms within a
  • Extinctions now 1,000 times faster than before humans
    It calculated a "death rate" of how many species become extinct each year out of 1 million species In 1995, Pimm found that the pre-human rate of extinctions on Earth was about 1
  • Why are there so many species of bugs, but so few species of . . .
    Take insects as an example, animals which evolved around 480 million years ago There are perhaps 6 million species living in all manner of environments, and occupying an incredible diversity of
  • What Is the Worlds Oldest Known Animal Species?
    Sixteen species of shield shrimp occur in temporary water bodies all over the world, but the animals may be rare in a given area There are two basic types (genera) of shield shrimp, Triops and Lepidurus Scientists credit Triops cancriformis as the oldest animal species Other species may not be quite so old, but the natural histories of the
  • How Birds Survived the Dinosaur Apocalypse | Science | AAAS
    When nearly every dinosaur went extinct 66 million years ago, the only ones that survived were those that had shrunk—that is, the birds Today, there are 10,000 species of these feathered fliers, making them the most diverse of all the four-limbed animals





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