What is unique about visible
light in the electromagnetic
spectrum?
a. it has the lowest wavelength.
b. it has the highest energy.
c. it is the only portion of the spectrum we
can see.

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.

According to the cladogram, which organisms have roundworms as a common ancestor?

Which of the following types of pollution is most responsible for large numbers of deaths worldwide because of unsafe drinking water? (a) nutrient pollution (b) thermal pollution (c) pathogen pollution (d) sediment pollution