In Figure 47-1, dentin is labeled as number:
a. 1
b. 2
c. 3
d. 4
e. 5
B
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The term oxidation is derived from the name of the element oxygen. This is reasonable, because oxygen
A. attracts electrons very strongly. B. can be oxidized by accepting electrons. C. contains more electrons than are needed. D. passes electrons to many other types of molecules.
A researcher wants to introduce the human gene encoding tissue plasminogen activator (used to dissolve blood clots) into a mammal so that the protein will be secreted into the milk of the mammary gland. What is required for the researcher's success?
A. The gene should be placed a considerable distance away from the promoter of a gene that is expressed in mammary cells. B. The gene should be placed next to the promoter of a gene that is expressed in mammary cells. C. The gene should be placed a considerable distance away from the promoter of a gene that is expressed in multiple types of cells. D. The gene should be placed next to the promoter of a gene that is expressed in multiple types of cells. E. The gene should be inserted in place of the promoter of a gene that is expressed in multiple types of cells.
The ____ component of plasma constitutes antibodies
a. albumin b. dissolved gas c. fibrinogen d. hormone e. immunoglobulin
The kind of vegetation in a tropical rain forest is generally determined by the amount of
A) rainfall. B) organic material in the soil. C) minerals in the soil. D) light.