A fertilized egg implants when it becomes a ______.
A. morula
B. corpus
C. placenta
D. blastocyst
Answer: D. blastocyst
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The gametophyte is green and nutritionally independent in
A. mosses, liverworts, and ferns. B. angiosperms. C. gymnosperms. D. tracheophytes. E. seed plants.
Oxygen dissolved in water moves ____________________ it does in air
a. faster than b. slower than c. at the same rate as d. faster or slower, depending on the microbe content of the water, than
The immunoglobulin class that has an Fc region that binds to receptors on basophils and mast cells is ________.
A. IgE B. IgA C. IgD D. IgG E. IgM
The length of the lag phase of growth can vary depending on ________.
A. the temperature B. the nature of the growth medium C. the condition of the microorganisms D. All of the choices are correct.