Which is not a characteristic of spirochetes?
A. The cells stain gram-negative.
B. The cells are always motile.
C. All cells have a cell wall.
D. The cells exhibit a helical shape.
E. All are pathogenic.
Answer: E
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According to the figure above, which of the following explains why the red panda is an important species to preserve?
A) Red pandas are a symbol of conservation efforts. B) Red pandas live in areas that are critically endangered. C) Seals are more important to preserve than the red panda because the ocean environment is critically endangered. D) Phylogenetically distinct species are high-priority species to target for conservation.
The following factors may sometimes play a role in the movement of sap through xylem. Which one depends on the direct expenditure of ATP by the plant?
A) capillarity movement of water within the xylem B) evaporation of water from leaves C) cohesion among water molecules D) concentration of ions in the symplast E) bulk flow of water in the root apoplast
The negative logarithm of the hydrogen ion concentration in the solution is referred to as:
A. pH B. atomic mass C. -OH concentration D. electronegativity E. specific heat
Joseph Lister reduced the incidence of wound infections in health care settings by using chlorinated lime water.
Answer the following statement true (T) or false (F)