Which of the following soil properties is not influenced by microorganism activity?

a. soil acidity

b. amount of organic matter

c. nutrient levels

d. none of the abov

Which of the following is an example of a disease that is properly matched with one of its environmental risk factors? High blood pressure-genetics Arteriosclerosis-diet Hemophilia-poor nutrition Anemia-family history

Organisms may contain up to five levels of organization within their bodies. Which level of organization is best represented by the liver?

Choose the event that triggers a primary succession. A. forest logging B. destructive hurricane C. coal mining D. volcanic eruption

Which of the following best describes the biological role of the lac operon? A. It ensures that a cell dedicates resources to the production of enzymes involved in lactose metabolism only when lactose is available in the environment. B.

How does Propionibacterium acnes cause acne in humans? A. Overuse of antibiotics can cause bacteria to clog pores in humans. B. This type of bacteria is found on the human skin, and it can clog pores. C.

Describe two ways in which indoor air pollution can be prevented?

What should you consider when addressing sensitive health issues?

3. Which is not a major component of natural gas? A hydrogen sulfide B carbon monoxide c methane D propane

On a submarine expedition to the ocean bottom, you discover a population of fish that are only female. What type of reproduction does this fish most likely use? a. sexual b. budding c. cloning d. parthenogenesis

4. Which of the following might be included in an ecological community Select all that apply. A) plants and animals b) multiple organisms C) abiotic factors d) multiple ecosystems e) a water source f) multiple populations