Which of the following gases is NOT a significant component of
the planet's atmosphere?
a Oxygen
b Nitrogen
C Neon
d None of the above

This aquarium exhibits biotic and abiotic factors in an aquatic environment. one of the abiotic factors is

Which of these statements is false? a. others may notice a problem with a relationship before the people involved. b. the first sign of a problem with a relationship is a feeling of anger. c. damaged relationships can be repaired. d. even good relationships can be damaged.

When the cell concentrates potassium within, against the natural tendency of matter, it is performing a.passive diffusion b.facilitated diffusion c.active transport d.pinocytosis