Chapter 12, Problem 25MC

The smallest independently functioning unit of an organism is a(n) ________. cell molecule organ tissue

Design a test (or series of tests) to support or refute this hypothesis: People who have no family history of high blood pressure (hypertension) but who eat a diet high in salt are more likely to develop high blood pressure than people with a similar family history but whose diet is much lower in salt.

A CT or CAT scan relies on a circling scanner that revolves around the patients body. Watch this video (http://openstaxcollege.org/l/CATscan) to learn more about CT and CAT scans. What type of radiation does a CT scanner use?

Jane Doe is infected with HIV. One of her medications is acyclovir, which is a/an ____________________ drug used to treat viral infections or to provide temporary immunity.

The first forms of life on Earth were thought to be_____. a. single-celled plants b. prokaryotes c. insects d. large animals such as dinosaurs

________ are characteristic of cancer. a. Malignant cells b. Neoplasms c. Tumors

Figure 1.8 Which of the following statements is false? A. Tissues exist within organs which exist within organ systems. B. Communities exist within populations which exist within ecosystems. C. Organelles exist within cells which exist within tissues. D. Communities exist within ecosystems which exist in the biosphere.

What is the function of the hormone erythropoietin? a. stimulates production of red blood cells b. stimulates muscle growth c. causes the fight-or-flight response d. causes testosterone production

The presence of a contractile vacuole indicates that a single-celled protist _______. a. is marine c. is photosynthetic b. lives in fresh water d. secretes a toxin