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  • Chimps, Humans 96 Percent the Same, Gene Study Finds
    Scientists have sequenced the genome of the chimpanzee and found that humans are 96 percent similar to the great ape species the scientists identified some 40 million differences among the
  • 2. 4 Diversity of Life – Human Biology
    Species diversity refers to the number of different species in an ecosystem or on Earth as a whole This is the most common way to measure biodiversity Current estimates for Earth’s total number of living species range from 5 to 30 million species Genetic diversity refers to the variation in genes within all of these species
  • 3 Billion Birds Gone - American Bird Conservancy
    But since 1970, on balance, many more birds have died than have survived, resulting in 2 9 billion fewer breeding birds today Some ecosystems show steeper losses than others For example: Forests alone have lost 1 billion birds since 1970 Grassland birds are also hard hit, with a 53% reduction in population — more than 720 million birds
  • Invasive Species Control | U. S. Department of the Interior
    The adverse consequences from invasive species range well into the tens of billions of dollars each year in natural and economic damages in the U S alone Additionally, invasive species have interfered with the recovery or contributed to the decline of 42 percent of federally listed threatened and endangered species
  • 38. 1 The Biodiversity Crisis - Biology for AP® Courses | OpenStax
    The exact number and kinds of species on Earth is unknown, but scientists estimate that there are about 8 7 million eukaryotic species, with only 1 5 million identified, named, and studied The number of prokaryotes far exceeds these numbers Biodiversity describes the number and variety of organisms in the biosphere
  • The Causes of Climate Change - Science@NASA
    The industrial activities that our modern civilization depends upon have raised atmospheric carbon dioxide levels by nearly 50% since 1750 2 This increase is due to human activities, because scientists can see a distinctive isotopic fingerprint in the atmosphere





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