Which of the following os an example of an organ?

nerve cell

epithelial tissue

digestive system

heart

Which best describes the scientists who contributed to our current body of knowledge? O A. White males O B. Europeans O C. People of all races O D. People from South Asia

What is the role of a pioneer species in primary succession? to destroy parasites to create shade to provide fruit to create the soil

Viruses can be transmitted through air, water, food, insect bites, and direct skin contact. Once a virus gains entry into the body, it invades a host cell in order to? A. synthesize antibodies for defense B. deactivate the host cell's defenses C.

Which of the following objects are reusable? Select all that apply. water bottle magazine plastic bag styrofoam

Mental ret4rdation that is environmental in origin has a specific physical cause. T or F

Which of these food sources does the bald eagle not feed on? plants fish carrion mammals

what will happen to a base isolated building when seismic wave strike the building during an earthquake

The shape and size of a birds beak would mostly be affected by what environmental limiting factor

Why do you think scientists use the word mutate to describe the genetic process shown in the video

Which best describes the purpose of a controlled experiment? A. to make sure the results of the experiment support the hypothesis B. to prevent a dangerous condition resulting from a reaction C.