**Question:** The average life of a cyclops is about -

A. 2 years
B. 5 years
C. 10 years
D. 20 years

**Core Concept:** Cyclops is a term used to describe a single-eyed creature, most famously associated with the Greek mythological character, Polyphemus. In the context of this question, it refers to a single-celled organism or protozoan with a single eye structure.

**Why the Correct Answer is Right:** The correct answer, **D. 20 years**, is attributed to the longevity of certain single-celled organisms like the amoeba. These organisms have a simple, unicellular lifestyle and can survive for a relatively long duration compared to most other single-celled organisms.

**Why Each Wrong Option is Incorrect:**

A. 2 years: This is too short for a single-celled organism, as they generally have a lifespan ranging from a few weeks to months.

B. 5 years: This is still too short for single-celled organisms, which typically have a lifespan much shorter than 5 years.

C. 10 years: Similar to options A and B, 10 years is still much shorter than the lifespan of many single-celled organisms.

**Why the Correct Answer is Right:**

**Clinical Pearl:** The concept of "long-lived" single-celled organisms like amoebas is often used as a teaching tool in microbiology and immunology to explain the concept of immunity, as these organisms can persist in an individual's body for extended periods, allowing for immune system development and maturation.

This is a good example of how misconceptions from mythology and literature can be used to teach complex medical concepts in a memorable and engaging manner.