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Which of the Following Was Likely the First Adaptation to Occur

question 17

Multiple Choice

Which of the following was likely the first adaptation to occur during the evolution of the human eye?


Definitions:

Cell Theory

A fundamental biological principle stating that all living organisms are composed of cells, which are the basic unit of life.

Prokaryotic Cell

A simple, unicellular organism without a nucleus or other membrane-bound organelles, such as bacteria.

Bacterium

Single-celled prokaryotic organisms that are members of the domain Bacteria. Lack a nucleus and membrane-bound organelles.

Cell Theory

A fundamental scientific theory that postulates that all living organisms are composed of cells, that the cell is the basic unit of life, and that all cells come from pre-existing cells.

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