Answer:
Gas exchange takes place in the millions of alveoli in the lungs and the capillaries that envelop them. As shown below, inhaled oxygen moves from the alveoli to the blood in the capillaries, and carbon dioxide moves from the blood in the capillaries to the air in the alveoli.
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Meiosis produces four genetically different haploid cells.
D should be correct....
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It was the theory that an organism could form from something such as mud for an example.
