Homo erectus _____
a. was the earliest member of the genus Homo
b. was one of the australopiths
c. evolved in Africa and dispersed to many regions
d. disappeared as the result of an asteroid impact
C
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A reinterpretation of animal phylogeny (differing from morphologically based phylogeny) that was made possible by molecular techniques, was:
A. designation of the Ecdysozoa and Lophotrochozoa as clades B. designation of the Bilateria as a monophyletic group C. designation of annelids and arthropods as closely related D. designation of rotifers and nematodes as closely related E. placement of echinoderms and chordates in entirely different clades
What is the most likely reason that bats, raccoons, and foxes readily become infected with the rabies virus, whereas opossums are resistant to infection?
A. The rabies virus is unable to replicate once it has entered the opossum cells. B. Infected opossums do not shed rabies virus in their saliva. C. Opossums rarely contact other infected animals. D. Opossums lack the appropriate receptor for the rabies virus.
Loss of tumor suppression in a cell usually results from
A) a translocation of a tumor suppressor gene. B) an inversion involving a tumor suppressor gene. C) a deletion of a tumor suppressor gene. D) activation of a proto-oncogene by a virus.
Eosinophils are filled with hemoglobin
____________________ Indicate whether the statement is true or false.