Which of the following statements is true of the
proteobacteria?
a. They are the largest group of bacteria.
b. Some are photoautotrophs.
c. Some are chemoautotrophs.
d. Some are chemoheterotrophs.
e. All of these are true.
Answer: e
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True or false: Marine fish have impermeable renal tubules, allowing them to reabsorb scarce elecrolytes without also reabsorbing water they are trying to eliminate
A. true B. false
Mitochondrial Eve was
A) fossil evidence of the Biblical Eve. B) a figurative first woman who had a mtDNA sequence that could have given rise, by mutation, to all modern human mtDNA. C) a hominid who had features of both australopithecines and Homo. D) a famous female paleontologist who has studied several fossil hominids in Ethiopia.
The rate of aggressive interactions among individuals increases as population density increases
Indicate whether the statement is true or false
In DNA molecules,
cytosine pairs with adenine. thymine pairs with uracil. adenine pairs with uracil. adenine pairs with thymine. cytosine pairs with thymine.