Hello!! I think your best answer would be D - Tetrad because consists of four chromatids. It is made up of two (pair) of homologous chromosomes that have already replicated into a pair of sister chromatids. I hope this answers your question. Have a great day!! :)
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Gas exchange occurs at two sites in the body: in the lungs, where oxygen is picked up and carbon dioxide is released at the respiratory membrane, and at the tissues, where oxygen is released and carbon dioxide is picked up.
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D. Tap water out of a steel bottle
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B. the breakdown of glucose in the chloroplast
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Convection drives the circulation of air in the earth’s atmosphere. The sun heats the air near the earth’s equator, which becomes less dense and rises upward. As it rises, it cools and becomes less dense than the air around it, spreading out and descending toward the equator again.
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