Choose all the answers that apply. Oxygen is .
released into the air by the lungs
pumped to cells by ventricles
picked up in the alveoli
transported by blood

Did the vinegar diffuse all the way to the center of any of the cubes? if so, which ones? what does this tell you about surface area-to-volume ratio and the diffusion rate?

Land conservation is a worldwide priority. there are several methods to prevent the loss of land due to a variety of reasons. which method is not a way to conserve land? a) sea walls b) rainwater harvesting c) limits on clear cuts of forests d) cut and burn methods of clearing land

Explain why it’s important for scientists to study the sun. list at least two challenges researchers face when examining earth’s nearest star.