Which of these carries oxygen from the blood to a muscle cell or neuron?

Which of tehse is a statement based on observations, but without proof?

Which of these organelles would you look into if you wanted to see a protein that was in the process of being assembled?

A scientist hypothesizes that distracted driving (driving while texting) is a major cause of traffic accidents.  Which of the following would be the most ideal control group if this scientist wishes to test their hypothesis?

The movement of water from a region of high water molecule concentration to a region where there are less water molecules is called ____.

Which region of the digestive system has a unique shape because it contains a large number of bacteria for fermentation?

Which of these regions has the thinnest epithelium layer facing the inhaled air?

If you were to compare the DNA of a skin cell to the DNA of a neuron, they would be:

The Food and Drug Administration (FDA) requires every drug to pass a stringent testing procedure that is divided into different phases or stages (sometimes called “clinical trials”).  Which stage requires the drug manufacturer to test their new drug against the currently available drugs that treat the same condition?

At the very general level, the diffusion gradient (high to low) for oxygen actually favors the loss of oxygen from the blood into the air.  How does the body “reverse” this, creating a situation where oxygen actually wants to enter the blood from the air despite the “wrong” overall gradient?