This cholesterol derivative is found in fungal cell membrane and is targeted for anti-fungal treatments.  This substance gives the membrane stability.

You are interested in studying microbes in the Chesapeake bay.  You would be considered a/n _______________________________.

The Earth is closest to the Sun in which month of the year?

Which of the following statements about the force of gravity is FALSE?

In an ellipse, the ratio of the distance between the foci and the length of the major axis is called:

According to the geocentric view, everything in the heavens had to go around the Earth, which was the center of the universe. What objects did Galileo discover with his telescope that clearly didn’t go around the Earth?

We now know that the orbit of a stable planet around a star like the Sun is always in the shape of:

Which of the following is an important part of the reason it is hotter in summer in North America than in winter?

If you could see the new moon, at what time of day (roughly) would it rise?

The planet in our solar system with the shortest period of revolution is: