Which of the following statements about the Moon is true?
A) The Moon goes through a cycle of phases because it always has the same side facing Earth.
B) If you see a full Moon from North America, someone in South America would see a new Moon.
C) The Moon's distance from Earth varies during its orbit.
D) The Moon is visible only at night.
E) The side of the Moon facing away from Earth is in perpetual darkness.
Question 2
In very general terms, how do the temperature structures of the atmospheres of Venus and Mars differ from that of Earth?
A) They lack X-ray absorbing thermospheres.
B) They lack ultraviolet-absorbing stratospheres.
C) Their atmospheres are similar in structure to Earth's, but with much higher temperatures.
D) Temperatures in their tropospheres increase with altitude, rather than decreasing with altitude.
Overview of the citric acid cycle
Linking step between glycolysis and the Krebs cycle.
Control of the cell cycle by cyclin-dependent kinases, and the checkpoints at which they operate
Antineoplastic drug and the cell cycle
Life cycle of Pisum sativum
Generalized life cycle for land plants