What type of cell has no nucleus or membrane-bound organelles

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.

Hummingbirds drink nectar from flowers, while robins eat plant seeds. what does this reduce?

What form of anesthetic was used for field surgery