Chapter 4
Supplemental Quiz Questions

Consider the inter-relatedness of the descriptors given for each of the following 3 groups. Choose the one in each group that is not related to the others:

cytoskeleton
microtubule
mitochondria
50S subunit
nucleus

2. What data support the theory of endosymbiosis? What "common sense" observation refutes the theory of endosymbiosis?
Propose an alternative theory by which eukaryotic cells evolved from prokaryotic ancestors.

3. Scientific data suggest that humans infected with intestinal pathogens are more readily adapted to survive. How is this possible? What role do intestinal microbes play in human biology?

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