The microorganisms that are thought to resemble the first cellular forms of life on Earth are
A) H2-oxidizing hyperthermophiles.
B) acidophilic Archaea.
C) the Nanoarchaeota.
D) fermentative thermophiles.
Answer: A
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Hopanoids
A) are found in eukaryotes only. B) are related to cholesterol. C) are a type of glycolipid. D) are a type of phospholipid. E) all of the above
Which model of evolution is closest to what was originally suggested by Charles Darwin?
A) Punctuated equilibrium model B) Graduated model C) Neither the punctuated equilibrium model nor the graduated model D) Both the punctuated equilibrium model and the graduated model
Natural selection can increase the frequency of deleterious alleles
a. true b. false
Which of the following is NOT true of the corpus luteum? The corpus luteum
A. develops from a follicle. B. produces hormones. C. is present during the entire menstrual cycle. D. prevents the release of eggs.