Examine the phylogenetic tree depicted in Figure 26.17 as you address the following questions. Extremophiles live in environments with high temperature, low pH, or high salt conditions;
however, hyperthermophiles, acidophiles, and halophiles can also thrive in less extreme
environments.
A. true
B. false
B
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Which of the following structures of the eye is matched appropriately with its developmental material?
a. cornea ? ectoderm b. cornea ? crystallin c. lens ? optic cup d. retina ? crystallin e. retina ? ectoderm
Bacteria can exchange genes with other
bacteria by a method called
a. binary fission. b. meiotic recombination. c. conjugation. d. translation. e. compilation
The function of the appendix is
a. to digest proteins. b. not clear, but may relate to combating ingested bacteria. c. to digest fats. d. to absorb glucose. e. to absorb amino acids.
Of the following food products, which one was the most likely the source of Mr. Williams's infection?
a. cheese b. raw milk c. eggs d. cream