Answer: Aristotle's and Linnaeus's classification systems both divided all life into two groups: plant and animal.
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Answer:
POPs are lipophilic, which means that they can be stored in fatty tissues for long periods of time.
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Answer:
Salinity in an estuary varies according to one's location in the estuary, the daily tides, and the volume of fresh water flowing into the estuary. In estuaries, salinity levels are generally highest near the mouth of a river where the ocean water enters, and lowest upstream where freshwater flows in.
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