Provides a safe place for animals to stay, raise young, etc

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.

The idea of spontaneous generation was disproved by in a experiment involving jars of meat

Will give ! ! widentify the advantages and disadvantages of renewable and nonrenewable energy resources.