A fungus (/ËfÊÅÉ¡És/; plural: fungi or funguses) is any member of the group of eukaryotic organisms that includes microorganisms such as yeasts and molds, as well as the more familiar mushrooms. These organisms are classified as a kingdom, Fungi, which is separate from the other eukaryotic life kingdoms of plants and animals. A characteristic that places fungi in a different kingdom from plants, bacteria and some protists, is chitin in their cell walls.
The 11-year cycle of the number of sunspots was first demonstrated by Heinrich Schwabe (1789-1875) in 1843. There have been several periods during which sunspots were rare or absent, most notably the Maunder minimum (1645-1715), and less markedly the Dalton minimum (1795-1820) (Fig 2.8 in the book).
Best Answer: A. Sunspots are not really dark, they are less bright than the surrounding material. Most of the Sun emits with a temperature around 5000 K; sunspots are a couple thousand degrees cooler. Sunspots look dark because they're 3,000 degrees Fahrenheit cooler than the surrounding photosphere. They are in fact much hotter than the arc generated by an electric arc-welder and a large sunspot by itself in the sky would outshine the full moon.