The tree in your backyard is home to two cardinals, a colony of ants, a wasp’s nest, two squirrels, and millions of bacteria. Together, all of these organisms represent a(n)

To be scientifically valid, a hypothesis must be

Foods that are high in fiber are most likely derived from

Lactose intolerance is the inability to

An antibiotic kills 99.9% of a bacterial population. You would expect the next generation of bacteria to

Which of the following statements about the monomers and polymers found in living organisms is false?

A scientist suspects that the food in an ecosystem may have been contaminated with radioactive nitrogen over a period of months. Which of the following substances could be examined for radioactivity to test the hypothesis?

Which of the following statements about anabolic steroids is false?

Which of the following statements about pH is true?

Which of the following is dependent on the ability of water molecules to form hydrogen bonds with other molecules besides water?