Figure 101 Represents a Petri Plate

question 25

Multiple Choice

Figure 10.1 represents a Petri plate. The gray area is where bacteria A is growing, the black area is where bacteria B is growing. The white area is a zone where neither organism is growing. What is the best interpretation of what is observed on the plate?

• A) Bacteria B is producing an antibiotic that inhibits the growth of bacteria A.
• B) Bacteria A produces a compound that inhibits the growth of bacteria B.
• C) Bacteria A grows faster than bacteria B.
• D) Bacterial colony B has depleted the nutrients in the area around the colony.
• E) No conclusion can be made from this information.

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Definitions:

Excitation Transfer

A psychological process where arousal from one situation intensifies the reaction to a subsequent, unrelated event.

Physiologically Arousing

Events or stimuli that lead to an increase in physical or emotional activation.

Affect Balance

The ratio of positive to negative emotional experiences in one's life.

Positive Emotional Experiences

Occurrences that induce feelings of happiness, joy, or other pleasurable emotions.