Which worm sometimes uses specialized tentacles to exchange gas and capture food? a fluke
a planarian
an earthworm
a marine worm

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.

After fertilization, which type of cellular division is responsible for the growth and development of a complex, multicellular organism?

Why do bacteria thrive even in hostile environments