Describe the sixth mass extinction event, and its specific causes
What will be an ideal response?
Currently, most biologists believe that Earth is in the throes of its sixth mass extinction event and that we are the cause. The changes to Earth's environment by human population growth, resource use, and development have greatly altered conditions for many species, have driven many to extinction already, and are threatening countless more. The alteration and outright destruction of natural habitats, the hunting and harvesting of species, pollution, and the introduction of invasive species from one place to another have contributed to the threat to Earth's biodiversity.
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The left to right slope of the small island on the lower right of this photograph tells us that
A) a nearby stream on the mainland must be providing sediment to support the island.
B) wave action must be minimal in this area.
C) an area of coastal upwelling must be nearby.
D) the ocean depth must be increasing to the right.
Explain why it is not necessary to visit Earth's North Pole or South Pole to experience a polar environment
Which of the following terms is used when a middle-latitude storm system develops or strengthens?
A. cyclogenesis B. frontolysis C. convergence D. divergence
The damage to health resulting from exposure to a chemical is known as the
A. dosage. B. toxicity. C. transmissibility. D. variance. E. response.