The earliest human populations lived in
a. tropical rain forests.
b. deserts.
c. coniferous forests.
d. woodlands.
e. temperate deciduous forests.
Answer: d
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Which process allows a vertebrate to generate millions of different lymphocytes?
A. DNA rearrangement B. DNA reestablishment C. clonal variability D. instructional variation E. gene cloning
Use the phylogenetic tree below to answer the following question(s).
Which of the following statement is correct regarding the phylogenetic tree above?
A. The polar bear and the brown bear are the most recently evolved species. B. The sun bear's closest relative is the sloth bear. C. Most bears on the phylogenetic tree are extinct. D. The American black bear has no closely related species.
Which one of the following components of a tossed salad will pass through the human digestive tract and be digested the least?
A. sugar (in the dressing) B. oil (in the dressing) C. starch (in the croutons) D. cellulose (in the lettuce) E. protein (in the bacon bits)
What does the interaction between arrestin and clathrin promote?
a) the uptake of phosphorylated GPCRs into the cell by endocytosis b) the uptake of phosphorylated GPCRs into the cell by endocytosis c) the secretion of GPCRs d) the uptake of free hormone e) the expulsion of phosphorylated GPCRs from the cell by exocytosis