Which was the most likely food source for the first terrestrial tetrapods?
a. leaves
b. insects
c. small mammals
d. worms
e. eggs
ANSWER: b
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Consider the phylogeny (Fig. 34.15) below. The group Dikarya has more species than all other taxa on the tree combined
Using only the information conveyed by the labeled phylogeny below, indicate which one of the following statements is a plausible explanation why this is so. A. The amount of available habitat is greater for members of the Dikarya. B. There hasn't been enough research done on the Chytrids, so there may be many more undescribed species. C. The evolution of hyphae allowed for rapid speciation of four of the five major groups of fungi. D. The Dikaryotic condition provides more genetic variation and opportunities for evolution of new species.
Molecules are made up of ______.
A. atoms B. cells C. organs D. organisms E. populations
The critical enzymatic virulence factor that helps allow Helicobacter pylori survive in the harsh acidic environment of the stomach is ________, which drives the local pH up.
What will be an ideal response?
A ribosome contains _____
a. RNA only b. DNA only c. proteins only d. RNA and proteins e. RNA, DNA, and proteins