Study the image.
Which point shows the trade winds?
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Hemoglobin is the compound in red blood cells that carries oxygen to the body. the distribution of hemoglobin in women in g/dl of blood is approximately normally distributed with mean 14 and standard deviation 1. too little hemoglobin, and you're anemic. 2. too much, and (unless you live at high altitudes), you can have other problems.

What are the doorways into and out of cells, attached to the membrane, and built in the rough er.

Why do we perceive objects as retaining their brightness under different lighting levels?