Question

Which of the following observations about flagella supports the scientific conclusion that the flagella from eukaryotes and bacteria evolved independently?

A) Although the mechanism of movement in both flagella is the same, the protein that accomplishes the movement is different.
B) The protein structure and the mechanism of movement in eukaryotes' flagella are different from those of bacteria flagella.
C) The mechanics of movement and protein structure are the same in these flagella, but there are significant genetic differences.
D) The flagella of both eukaryotes and bacteria are made of the same protein, but the configuration is different.

Answer 1

B) The protein structure and movement mechanisms of eukaryotes' flagella are different from those of bacteria flagella.

Step-by-step explanation:

The correct observation that supports the scientific conclusion that flagella from eukaryotes and bacteria evolved independently is B) The protein structure and the mechanism of movement in eukaryotes' flagella are different from those of bacteria flagella.

In eukaryotes, flagella are composed of microtubules and move through a whip-like motion. In contrast, bacterial flagella are made up of proteins and move through a rotating motion. These differences in protein structure and mechanism of movement suggest that the flagella in these two groups evolved independently.