The classification of prokaryotes in Bergey's Manual of Systematic Bacteriology is largely based on
A. Gram stain reaction.
B. habitat.
C. type of electron receptor used in cellular respiration.
D. rRNA sequences.
E. cellular morphology.
Answer: D
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When Rebecca Cann decided to research on the evolution of humans, she chose to study mitochondrial DNA. Which of the following explains why she chose this type of DNA?
A. because mitochondrial DNA is more abundant and therefore easier to extract B. because mitochondrial DNA is recombined from generation to generation and offers a look at the lineage of the human population C. because mitochondrial DNA is circular D. because mitochondrial DNA lasts longer in the tissues
The first primates known for their extensive use of tools were
A) Homo habilis. B) Homo erectus. C) Homo afarensis. D) Homo sapiens.
The surface area of all the alveoli in the lungs is
equivalent to the surface of a regulation __________ court. a. tennis b. basketball c. racquetball d. jai lai e. all of these combined
Which molecule can enter the Krebs cycle reactions?
a. glucose
b. pyruvate c. carbon dioxide d. NADH e. acetyl-CoA