Which list of taxonomic levels is in the correct order, from most inclusive to least inclusive?
a. domain – kingdom – phylum – class
b. species – kingdom – family – order
c. genus – family – order – species
d. phylum – genus – family – species
e. kingdom – family – class - order
ANSWER: a
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External fertilization occurs in all of the following groups, except:
A. whales. B. frogs. C. salmon. D. perch. E. External fertilization occurs in all of the answer options.
What makes eukaryotic transcripts easier to isolate than transcripts in bacteria?
A) Eukaryotic transcripts are not methylated but their genes are often methylated. B) Larger transcript size in eukaryotes enables easy size-selection methods. C) mRNA is polyadenylated in eukaryotes. D) Transcripts are the most abundant RNAs in eukaryotes.
Based on the data in Table 18-1, which of the following primates has the most recent common ancestor with humans?
a. rhesus monkey b. gibbon c. tarsier d. gorilla e. orangutan
The element(s) that have proven useful for stable isotope studies are
A) carbon. B) nitrogen. C) sulfur. D) carbon, nitrogen, and sulfur.