Which of the following is most likely to move through the cell membrane by facilitated diffusion?

a. small lipids b. na+
c. co2 d. o2

The diagram shows the layers of earth. convection currents in which region influence the movement of tectonic plates

Question#29: why does the tropical ocean have a greater temperature range than the temperate ocean?

According the inverse square law, doubling the distance from the source of the sound, a speaker, for example, will drop the sound 6 db each time. if you were standing in the back of an auditorium, 32 feet away from a speaker not using any amplification, would you be able to hear a speaker clearly? why or why not?