This blood component plays a role in osmotic balance of plasma.

A) red blood cells
B) neutrophils
C) platelets
D) plasma proteins

What differentiates an organic compound from an inorganic compound?

A) An organic compound lacks isotopes.
B) An organic compound contains carbon.
C) An organic compound lacks valence electrons.
D) An organic compound is basic rather than acidic.
E) An organic compound contains two or more atoms.

Four of the five answers listed below are characteristic of desert crusts. Select the exception.

A) ​form at the surface of desert soil
B) ​made up of living organisms, including cyanobacteria, lichens, mosses, and fungi
C) ​secrete organic molecules that are harmful to most other desert organisms
D) ​perform nitrogen fixation, making this nutrient available to plants
E) ​hold soil particles in place

The ________ division of the ANS functions mainly under ordinary, restful conditions.

A) parasympathetic
B) somatic
C) sympathetic
D) thoracolumbar
E) sensory