Traditional and molecular phylogenies disagree on which one of the following issues?
A. whether the split between Parazoa and Eumetazoa occurred at a very early stage in animal evolution.
B. whether the Bilateria and Radiata split early into separate monophyletic clades.
C. whether Echinodermata and Chordata are both deuterostomes.
D. whether or not the Eumetazoa are monophyletic.
E. whether the appearance and type of coelom is important in interpreting phylogeny.
Answer: E
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A. Passive diffusion B. Active transport C. Facilitated diffusion D. Active transport and facilitated diffusion
Suppose that in the future, scientists identify bacteria on Mars and these organisms lack a site-specific recombination system. Which components would allow for site-specific recombination to occur in these bacteria?
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The name "human" is an example of a
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Benign positional vertigo is due to
A. the formation of particles in the cochlea. These particles will stimulate the stereocilia producing a sensation of movement when there is actually no movement. B. the formation of particles in the semicircular canal resulting in an inner ear infection. C. the formation of particles in the malleus. These particles will stimulate the stereocilia producing a sensation of movement when there is actually no movement. D. the formation of particles in the semicircular canal. These particles will stimulate the stereocilia producing a sensation of movement when there is actually no movement. E. the calcification of the malleus producing a decrease in the conduction of sound.