When Adult Amphibian Skin Harbors Populations of the Bacterium, Janthinobacterium

question 32

Multiple Choice

When adult amphibian skin harbors populations of the bacterium, Janthinobacterium lividum (Jl) , chytrid infection seems to be inhibited. Which of the following represents the best experimental design for conclusively determining whether this inhibition is real?

• A) Inoculate uninfected amphibians with Jl, and determine whether the amphibians continue to remain uninfected by chytrids.
• B) Inoculate infected amphibians with Jl, and determine whether the amphibians recover from infection by chytrids.
• C) Take infected amphibians and assign them to two populations. Leave one population alone; inoculate the other with Jl. Measure the rate at which infection proceeds in both populations.
• D) Take infected amphibians and assign them to two populations. Inoculate one population with a high dose of Jl; inoculate the other with a low dose of Jl. Measure the survival frequency in both populations.

---

Definitions:

Changes in Cash

The increase or decrease in a company's cash level within a specific period, reflecting its cash inflow and outflow.

Liabilities

Creditor claims against total assets.

Noncash Assets

Refers to assets that are not in the form of cash or easily convertible to cash, including real estate, equipment, and inventory.

Operating Activities

Activities that relate directly to the business's primary operations, including cash receipts from sales of goods and services and cash payments for expenses.