Human females start to form eggs, or ova, at puberty. true or false

Define Eutrophication and Algal Blooming.

What is the name for NH4NO2?

What is the difference between variable and fixed costs?

Where would you start when describing the blood flow through the circulatory system? (mainly the heart) I need to know because I'm writing a paper about the blood flow of the circulatory system from the perspective of a red blood cell.

What role do clouds play in regulating earths energy balance?

What is the purpose of the biogeochemical cycles?

Strong trading kingdoms emerge in w. africa because of an abundance of salt and?

List and briefly describe 6 major ways dissecting a human would be different than dissecting a frog.

What is a inorganic compound in a living cell

What impact does thunderstorms have on people and the environment?