The watershed divide of the Ural Mountains forms the natural land boundary between the continents of Europe and Asia. The range, averaging 3,000â4,000 ft. in height, extends about 1,640 miles north-south from the Arctic Ocean to the northern steppe of Kazakhstan.he watershed divide of the Ural Mountains forms the natural land boundary between the continents of Europe and Asia. The range, averaging 3,000â4,000 ft. in height, extends about 1,640 miles north-south from the Arctic Ocean to the northern steppe of Kazakhstan.
Yeasts. Yeasts are unicellular fungi. Examples: 1  Saccharomyces cerevisiae â bakerâs or brewerâs yeast. 2  Saccharomyces boulardii is a part of normal intestinal flora; available in pharmacies as probiotic, which can prevent antibiotic associated diarrhea.
Fungi were originally thought to be related to plants but are now recognized as being their own kingdom. Their cells typically have a nucleus, but unlike plants, have no chlorophylls and therefore cannot produce their own food. The multicellular forms often have branches called hypha. Yeasts are unicellular and have tough cell walls. Fungi reproduce by spores, which disperse through wind, water or animals and grow only if they land on an appropriate food source.