7. Explain how protist are thought to have given rise to multicellular organisms.

Nuclear accidents are among the most feared disasters. The radioactive materials released can contaminate land and water, making them uninhabitable for generations. One of the most dangerous radioactive materials is radioactive iodine, I-131.

What is the single replacement for Na + H3PO4

Why are scientist most likely working on developing cleaner-burning fuel for cars? A) to increase fuel consumption B) to increase fuel production C) to reduce noise pollution D) to reduce air pollution

Why do large carnivorous animals such as lions often need to eat just once per day?

What processes in a cell need the energy from ATP

Many functions in the body are controlled by special compounds. Which statements about these compounds do you think are true? Check all that apply

Which curve was most likely generated from analysis of an enzyme from a human stomach where conditions are strongly acid?

Based on the text, why might the California's Division of Safety of Dams have ordered in 2001 that the Calaveras Reservoir be kept at no more than 40% full?

What role does nitrogenous bases have in DNA and RNA

How do carnivores (which eat only meat) obtain nitrogen for building critical organic molecules? A) They eat consumers, which ate plants, which absorbed it from the soil. B) They absorb the nitrogen in the ground through their skin.