Nature & Geography | The Canadian Encyclopedia

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    Yew is the common name for evergreen conifers, genus Taxus, of the yew family (Taxaceae).

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    Yukon River

    At 3,185 km (1,149 km of which lie in Canada), the Yukon River is among the longest rivers in the country (see also Longest Rivers in Canada). Its headwaters are in the northwest corner of British Columbia, at the province’s border with the Yukon. It flows north and northwest across the Yukon into Alaska, then west to Norton Sound on the Bering Sea. Within the large central plateau of the Yukon, ringed by the Mackenzie Mountains to the east and the St. Elias range to the southwest, the Yukon River and its tributaries form the region’s dominant drainage basin.

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    Zinc (Zn) is a bluish-white metal of low to intermediate hardness that melts at 419°C and is estimated to comprise about 0.013% of the earth's crust. Zinc is an essential element for human health; over 200 enzymes in the body require zinc for proper functioning.

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    Zoology is the study of ANIMALS. Zoologists have many interests: some study form (morphology) or function (physiology), from gross to molecular levels; behaviour (ethology); association (ecology); or distribution (zoogeography); and some specialize in one kind of animal.

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    Zooplankton, weakly swimming animals belonging to many phyla (primary divisions of the animal kingdom), which, as larvae or adults, exist wholly suspended within a water body.

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    Zoos, also known as zoological gardens, are facilities exhibiting wild and domesticated animals for purposes of education, recreation, conservation and research. Zoos range from conventional, dense-occupancy facilities to open animal parks and game farms. They can incorporate aquariums exhibiting fish and other aquatic life forms. There are 28 accredited zoos in Canada, according to the Canadian Association of Zoological Parks and Aquariums. Canada’s largest zoo is the Toronto Zoo.

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