What Statement Best Summarizes the Evolutionary History of Eyes

question 12

Multiple Choice

What statement best summarizes the evolutionary history of eyes?

• A)Development of light-sensing organs evolved once, but several eye structures evolved separately.
• B)Eyes evolved once and were slightly modified in different phyla.
• C)Eyes evolved separately in each phylum from an ancestor with no ability to detect light.
• D)Light-detection organs can develop with very little developmental constraint.

---

Definitions:

Excludes2

A term used in medical coding indicating that a condition is not included within a given category, without implying an absolute separation from related conditions.

ICD-10 Convention

An international classification system for diseases and related health problems, tenth edition, used for coding and reporting diagnoses and procedures in health care settings.

Principal Diagnosis

The diagnosis that is found, after testing and study, to be the main reason for the patient's need for healthcare services.

Environmental Events

Occurrences or changes in the environment that have significant impact on ecosystems, communities, or the climate.