Question

comparison of selective and differential media
label the figure to demonstrate your understanding of selective and differential media.

Explanation:

1. For the left - hand side (first mixed sample distribution):

• The first plate (with many different - looking colonies) should be labeled "General - Purpose Medium (many different species grow)" because general - purpose media allow a wide variety of microorganisms to grow, and we can see a large number of different - appearing colonies.
• The second plate (with a more restricted and colored growth, maybe selecting for certain types) should be labeled "Selective Medium" as selective media are designed to inhibit the growth of some microorganisms and promote the growth of others, leading to a more restricted growth pattern compared to general - purpose media.

1. For the right - hand side (second mixed sample distribution):

• The first plate (with colonies that look similar) should be labeled "General - Purpose Medium (different species look similar)" as general - purpose media can have growth where different species may not be easily distinguishable by appearance.
• The second plate (with colonies that have different appearances, maybe due to differential characteristics) should be labeled "Differential Medium" as differential media allow different microorganisms to show different characteristics (like different colors or colony morphologies) that help in distinguishing between them.

Answer:

• Left - hand first plate: General - Purpose Medium (many different species grow)
• Left - hand second plate: Selective Medium
• Right - hand first plate: General - Purpose Medium (different species look similar)
• Right - hand second plate: Differential Medium