Which of the following statements concerning bacterial flagella is true?
a. The flagella of bacteria and archaea are homologous.
b. The mechanism of movement in bacterial flagella is different from that in protist flagella.
c. Although the mechanism of movement in all flagella is the same, bacterial flagella have an independent evolutionary origin.
d. All bacteria have flagella.
e. Bacterial flagella are much larger than eukaryotic flagella
Answer: b. The mechanism of movement in bacterial flagella is different from that in protist flagella.
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When studying fluid and electrolyte loss during exercise, Robert Cade found that human sweat has sodium and chloride concentrations that are ______ those found in the blood.
A. higher than B. lower than C. equal to D. extremely variable from person to person relative to E. There is no sodium or chloride in sweat.
All arteries, with the exception of the __________, contain oxygen-rich blood
a. aorta b. carotid arteries c. coronary arteries d. pulmonary arteries e. mesenteric arteries
What name is given to the membranous sacs found within a chloroplast?
A) stroma B) mitochondria C) thylakoids D) vesicles
We know the streamlined bodies shown in the figure above are examples of homoplasy. If the following groups also had streamlined bodies, which of the groupings would give the most support to this body type being homologous?
A) lizards and elephants B) pterosaurs, dinosaurs, and birds C) synapsids, monotremes, marsupials, rodents, and primates D) lizards, pterosaurs, dinosaurs, birds, synapsids, monotremes, marsupials, rodents, and primates