One species of plant contains several different groups. Each group is slightly different from the others and capable of sexual reproduction. These groups are called
A. subspecies.
B. clones.
C. species.
D. mutations.
A. subspecies.
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Examine Figure 23.2 in your textbook. According to this figure, the amphibians are a _____ group
A. monophyletic B. paraphyletic C. polyphyletic
Which of the following statements regarding helminths causing intestinal distress plus migratory symptoms is incorrect?
A. Praziquantel is the best treatment option for infection with these helminths. B. Nearly all newborn puppies in the U.S. are infected with Toxocara species. C. Tissues along the migratory route of the helminth experience inflammation. D. All of these infections are associated with eosinophilia, which can be detected in a complete blood count.
The first life on Earth was probably most similar to modern-day
A. bacteria. B. protists. C. Archaeans. D. plants. E. fungi.
Which microscope achieves the highest magnification and greatest resolution?
A) compound light microscope B) phase-contrast microscope C) darkfield microscope D) fluorescence microscope E) electron microscope