In sea urchin development, the archenteron becomes the:
A) endoderm. B) lungs. C) ectoderm. D) digestive tube.
Answer: D
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An -OH group is a(n) ____ group
a. carboxyl b. hydroxyl c. amino d. methyl e. carbonyl
In cell movement, branched actin filament growth pushes against the cell membrane. Proteins involved in this process include all of the following except
a. Arp2/3 b. profilin c. vinculin d. WASP/Scar
Figure 39.9
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Use the figure above to answer the following question.
The structure designated by the letter "B" in the above figure is called the ____.
A. pyloric sphincter B. esophagus C. small intestine D. duodenum E. appendix
Which of the following is considered a model for enzyme action?
A. Lock and Key model B. Enzyme interaction model C. Transformation model D. Transcription model