Certain proteins of the complex motor that drives bacterial flagella are modified versions of proteins that had previously belonged to plasma membrane pumps.This evidence supports the claim that
A)some structures are so complex that natural selection cannot,and will not,explain their origins.
B)the power of natural selection allows it to act in an almost predictive fashion,producing organs that will be needed in future environments.
C)the motors of bacterial flagella were originally synthesized abiotically.
D)structures originally adapted for one purpose can take on new functions through descent with modification.
E)bacteria that possess flagella must have lost the ability to pump certain chemicals across their plasma membranes.

Question

Quizplus · Accepted Answer

The evidence presented shows that certain proteins originally belonged to plasma membrane pumps, but are now part of the complex motor that drives bacterial flagella. This indicates that structures adapted for one purpose (plasma membrane pumps) can take on new functions (motor proteins for flagella) through descent with modification, supporting the idea of evolution through natural selection.

Certain Proteins of the Complex Motor That Drives Bacterial Flagella