Which of the following materials is a conductor of electric current a plastic game piece a glass window a wooden spoon a copper penny

The cluster of developing cells from conception until birth is called an

This group of organisms perform the process of ammonifcation. a. herbivores b. decomposers c. carnivores c. plants

The image below shows a common blood pressure gauge. what does this device do? a. measures the level of oxygen present in the blood b. measures the pressure of blood when the lungs expand and compress c. measures the electrical activity of the heart d. measures the pressure of blood when the heart contracts and relaxes