A controlled experiment must A. have a dependent variable. B. have an independent variable. C. be falsifiable. D. be repeatable. E. All of the above.

Which of the following is a true statement? Question 2 options: 1) Light energy causes water molecules to split up. 2) Light energy bonds the carbon and oxygen together to make carbon dioxide. 3) Light energy creates water molecules.

Hormones produced by many tissues that, among other effects, promote inflammation are

Which of the following is a primary product? A. a producer, like algae B. a carnivore, like a lion C. an omnivore, like a human D. a detritivore, like an earthworm

Two or more rhythmic patterns occurring simultaneously is an example of

Breaks down complex molecules into simpler parts and allows them to be carried out of the body as waste

Which action may have caused botulism? A. Defrosting the chicken on the counter. B. Using the same cutting board for chicken and lettuce without washing it. C. Consuming tuna from a dented, bulging can. D.

How does the body use energy?

6. A substance that enters Earth's cycles and does harm to living things is A. oxygen. B. hydrogen. C. freshwater. D. a pollutant.

Which enzyme unwinds and separates the two strands of the DNA double helix?

A client has an elevated serum ammonia concentration and is exhibiting changes in mental status. the nurse should suspect which condition?