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is one-millionth of a metre or one-thousandth of a millimetre (0,001 mm). Its unit symbol in the International System of Units (SI) is µm.
microscopes that do not rely on light to produce images. They are used to study the internal...
one of the building blocks of lipids (fats).
(also called pith rays) sections of the medulla that occur between the vascular bundles.
a blood vessel that carries blood to the kidney to be filtered.
two species that interact symbiotically in a relationship that is beneficial to both species....