The most objective way to construct a phylogeny is to focus on characters
A. inherited from a common ancestor.
B. that confer adaptedness to a particular habitat.
C. that are large in size.
D. acquired during an organism's lifetime.
Answer: A
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An intermediate in the creation of DNA nucleotides is ribose 5-phosphate, shown here. What enzymatic activity is needed to ready ribose 5-phosphate for use in DNA nucleotide synthesis?
A. DNase B. reductase C. oxygenase D. RNase E. RNA polymerase
The ultimate source(s) of energy, on which all living organisms depend, is(are) __________
a. the sun b. autotrophs c. primary producers d. the first trophic level
Ctenophores capture their food with feeding tentacles
a. True b. False
Which of the following is diagnostic for Neisseria meningitidis?
A) the presence of Gram-negative diplococci in CSF phagocytes B) a catalase positive reaction C) the presence of lipid A D) the lack of lipooligosaccharide E) the presence of white blood cells in the CSF