Which of the following observations about flagella is accurate and is consistent with the scientific conclusion that the flagella from eukaryotes and bacteria evolved independently?
A) The flagella of both eukaryotes and bacteria are made of the same protein, but the configuration is different.
B) The mechanics of movement and protein structure are the same in these flagella, but there are significant genetic differences.
C) Although the mechanism of movement in both flagella is the same, the protein that accomplishes the movement is different.
D) The protein structure and the mechanism of movement in eukaryotes flagella are different from those of bacteria flagella.

Question

Quizplus · Accepted Answer

The observation that the protein structure and the mechanism of movement in eukaryotes flagella are different from those of bacteria flagella is the most accurate and consistent with the scientific conclusion that the flagella from eukaryotes and bacteria evolved independently. This indicates that the flagella in these two domains of life have different evolutionary origins and mechanisms of development. Option A is incorrect because if the flagella were made of the same protein with different configuration, it could suggest a common evolutionary origin. Option B is incorrect because significant genetic differences can occur even in evolutionary homologs. Option C is incorrect because it contradicts the observation that the mechanism of movement in both flagella is the same.

Which of the Following Observations About Flagella Is Accurate and Is