scientists suggest that galaxies are moving away from earth due to
a - dark energy
b - doppler shift
c - gravity
d - solar energy

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.

This is one of the five kingdoms in the older biological succession. organisms in this kingdom are prokaryotic

Apart of an ecosystem that can restrict the growth of a population is referred to as