Which organelle is responsible for allowing materials to move in and out of the cell? * *
nucleus
cytoplasm
plasma/cell membrane
ribosomes

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

Which of the following is the earliest era of earth's geologic time scale? cenozoic mesozoic precambrian paleozoic

This is the main structural axis of the plant that supports leaves, flowers and fruits; transports fluids; stores nutrients and produces new tissue.