Question

Use the dichotomous key on page 865, Figure 25.10, to determine which of the following organisms is positive for glucose, lactose, and indole.

Choose one:
A. Streptococcus pneumoniae
B. Escherichia coli
C. Yersinia pestis
D. Klebsiella pneumoniae

Answer 1

The dichotomous key on page 865, Figure 25.10, can help identify the organism that is positive for glucose, lactose, and indole. According to the key, Escherichia coli (Option B) is the organism that meets these criteria.

Step-by-step explanation:

The dichotomous key on page 865, Figure 25.10, can be used to determine which of the organisms is positive for glucose, lactose, and indole. The key provides a series of questions that help identify each organism based on specific characteristics. Let's use the key to find the organism.

Steps:

1. Start at the top of the key.
2. Follow the instructions and answer the questions based on the characteristics of each organism.
3. Go through each step until you reach the end of the key.
4. Based on your answers, you will be able to identify the organism that is positive for glucose, lactose, and indole.

Based on the key, the organism that is positive for glucose, lactose, and indole is Escherichia coli (Option B).