What percentage of the population are children 4 years old or younger in Western Europe?
A. 2.5
B. 5
C. 10
D. 17
E. 22
B. 5
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The interaction between an antibody and its antigen is most similar to which of the following?
A. a codon and its anticodon B. an enzyme and its substrate C. a receptor and its ligand D. a motor protein and its cytoskeletal filament
Which human trait shows a continuous variation?
a. Cystic fibrosis b. Marfan syndrome c. Eye color d. Blood type e. Sickle cell anemia
What do binary fission and mitosis have in common?
a. They both occur in prokaryotic cells. b. They both occur in plant cells. c. They both require DNA replication before cell division. d. They have nothing in common.
In cases where a perpetual "arms race" occurs between biological antagonists, such as parasites and their hosts, sex is favored because it reduces linkage disequilibrium by recreating missing genotypes in an oscillating fashion
This hypothesis is called the ________ [two words] hypothesis. Fill in the blank(s) with correct word