Question

Observe the relation between the first two words and complete the analogy. 
Dengue: Aedes :: Plague: __________
 

Hint:

Biological analogies usually require the vector or the causative agent; read the first pair carefully to identify the relationship.

Answer 1

Step 1: Understanding the Concept:
This is a vector-disease relationship analogy.
Dengue is a disease transmitted by the Aedes mosquito.

Step 2: Detailed Explanation:
Plague is caused by the bacterium Yersinia pestis.
It is transmitted to humans via the bite of an infected flea that typically lives on rats.
The scientific name for this rat flea is Xenopsylla cheopis.

Step 3: Final Answer:
The correct term is Xenopsylla cheopis.