Plant Kingdom The plant kingdom comprises of about 260,000 known species of mosses, liverworts, ferns, herbaceous and woody plants, bushes, vines, trees, and various other forms that cover the Earth and are also found in waters. ... Plants are multicellular eukaryotes; their cells contain membrane-bound structures called organelles. ... During photosynthesis, plants make their own food by converting light energy into chemical energy, a process carried out in the green cellular organelles called chloroplasts Parts of the Plants Cells: The many varieties of plant species have distinc...

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A good example of known uncertainty (error) is found with polling results. ... An atom contains a dense inner region called the nucleus. The nucleus contains the atom's protons and neutrons. ... The outer region occupied by electrons is much larger than the dense nucleus. The electrons are thought to orbit the nucleus within an area, the size and shape of which are related to the electrons' energy. ...

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• Grade Level: High School