1. Why do systematic biologists find rRNA sequence data more useful than data on metabolism or cell structure for classifying prokaryotes?
2. Why does lateral gene transfer make it so difficult to arrive at agreement on prokaryote phylogeny?
3. Differentiate among the members of the following sets of related terms:
a. prokaryotic/eukaryotic b. obligate anaerobe/facultative anaerobe/obligate aerobe c. photoautotroph/photoheterotroph/chemolithotroph/ chemoheterotroph d. Gram-positive/Gram-negative
4. Why are the endospores of firmicutes not considered to be reproductive structures?
5. Until fairly recently, the cyanobacteria were called blue-green algae and were not grouped with the bacteria. Suggest several reasons for this (abandoned) tendency to separate the cyano-bacteria from the bacteria. Why are the cyanobacteria now grouped with the other bacteria?
6. The actinomycetes are of great commercial interest. Why?
7. Thermophiles are of great interest to molecular biologists and biochemists. Why? What practical concerns might motivate that interest?
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This ebook provides an introductory explanation of the workings of the human body, with an effort to draw connections between the body systems and explain their interdependencies. A framework for the book is homeostasis and how the body maintains balance within each system. This is intended as a first introduction to physiology for a college-level course.