A biologist counts the number of zebras in a population each year and notices an increase in the zebra population. Which describes the biologist's actions?

experimentation

inference

observation

interacting

Why can blue light and yellow light combine to produce white light? A. They are complementary colors of light. B. Because blue, yellow, and white are primary colors. C. They absorb each other's wavelengths. D. They are both primary colors of light.

You have learned that all living things use energy your dog is a living thing she must use energy what process is used in this example

What organic compound makes up the major portion of the cell membrane? A. protein B. lipid C. carbohydrate

Which of the following steps can a person take in order to best conserve fossil fuel resources

What is the name of the organ, shown here, that makes the "lub-dub" sound in your chest?

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?