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Each red blood cell carries about 250 million molecules of hemoglobin. If every hemoglobin molecules is attached to four oxygen molecules, how many oxygen molecules could one red blood cell carry?
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What type of cell is produced after fertilization occurs and the gametes combines ?
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Of seawater increases with decrease in the temperature. therefore, the cold water sinks to the deeper layers at the bottom
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Which of these is true of the cytoplasm of an unfertilized egg? a. it is an unevenly distributed mixture of mrna, proteins, organelles, and other substances. b. it does not contain substances that are important in directing development. c. these substances are supplied by the sperm. d. it does not contain substances that are important in directing development. e. development is directed solely by the surrounding cells. f. it is a homogeneous mixture of mrna, proteins, organelles, and other substances. g. it does not contain substances that are important in directing development. h. these substances are produced by the dna of the fertilized zygote.
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1. which of the following transport mechanisms utilizes energy? a. osmosis b. diffusion c. facilitated diffusion d. endocytosis
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Each red blood cell carries about 250 million molecules of hemoglobin. If every hemoglobin molecules...
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