Air pollution from World War II weapon production in Alabama, 1942
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Mammals are diphyodont, meaning that they develop two sets of teeth. In humans, the first set (also called the "baby", "mil... -
A cell in late metaphase. All chromosomes (blue) but one have arrived at the metaphase plate. -
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A chart showing three types of selection. 1. Disruptive selection 2. Stabilizing selection 3. Directional selection -
DNA structure. Bases are in the centre, surrounded by phosphate–sugar chains in a double helix.
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