Figure Represents a Petri Plate

question 55

Multiple Choice

Figure 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:

Null Hypothesis

A hypothesis that there is no significant difference or effect in a particular situation, used as a starting point for statistical testing.

Significantly Different

A term used to describe a result in statistical analyses indicating that observed differences or effects are unlikely to have occurred by chance.

Significantly Equal

A term not typically used in statistics; might refer to the concept of achieving statistical significance to claim no difference or equivalence between groups.

T-test

An analytical procedure for assessing if the average scores of two separate groups are significantly dissimilar.