A monosaccharide is the monomer of a carbohydrate. Carbohydrates, such as sugars and starches, store energy. Some monosaccharides are isomers .This means that they have the same chemical formula but a different arrangement of atoms. An example of such a pair of isomers is glucose and fructose.
When using a dichotomous key you look for the QUALITATIVE and QUANTITATIVE attributes of your specimen. Qualitative meaning the simple appearance such as color or the size. Quantitative meaning height, wings or no wings, tail or no tail, etc.
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Answer:
the later stages are small and the tool materials are of better quality than the previous stages.
Explanation:
The stone scrapers and the choppers found at the site of Zhoukoudian points out the fact that Peking men devised several tools for various purposes and to accomplish different tasks. The stones and the bones used to make the tools used to be charred by using the fire. This also indicates that the Peking men had discovered the uses of fire and they used fire for various activities.