The cerebral hemispheres communicate with each
other by means of the
a. cerebral cortex.
b. corpora cardiaca.
c. corporothalamus.
d. corpus callosum.
e. centrosome.
Answer: d
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The coelom forms in two different ways. Which of the following statements best compares those ways?
A. In schizocoelous development a solid mass of mesoderm splits to form the coelom whereas in enterocoelous development a layer of mesoderm cells forms a pocket off of the developing gut to form the coelom. B. In enterocoelous development a solid mass of mesoderm splits to form the coelom whereas in schizocoelous development a layer of mesoderm cells forms a pocket off of the developing gut to form the coelom. C. In enterocoelous development the coelom forms inside the mesoderm whereas in schizocoelous development the coelom forms on the outside of the mesoderm. D. In schizocoelous development the coelom forms within the mesoderm whereas in enterocoelous development, no coelom is formed at all. E. Schizocoelous and enterocoelous both form the coelom in identical ways, the difference merely being that the term schizocoelous is used only for deuterostomes and enterocoelous is used only for protostomes.
Oral lesions called Koplik's spots are seen in patients with ________.
A. influenza B. measles C. rubella D. mumps E. croup
Plasmids occur naturally in:
A. bacteria B. viruses C. animal cells D. plant cells
In Clackamas, Oregon, a stand of hybrid poplar trees was planted on an area of land that is contaminated with volatile organic compounds (VOCs). Why would someone purposely plant trees in an area with contaminated soil?
A) to use the trees as a means of phytoremediation B) to use the trees as a means of eliminating insect species that consume nearby endemic plants C) to use the trees for lumber for houses D) to see if animals will make nests in trees that grow in contaminated soil.