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 lack chlorophyll and therefore are not capable of photosynthesis. They may be saprophytes or parasites. Unicellular fungi (yeasts) reproduce by budding; multicellular fungi, such as molds, reproduce by spore formation. Fungi may invade living organisms, including humans, as well as nonliving organic substances. Of the 100,000 identified species of fungi, 100 are common in humans and 10 are pathogenic.