In sea urchin development, the archenteron becomes the:

A) endoderm. B) lungs. C) ectoderm. D) digestive tube.


Answer: D

Biology & Microbiology

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An -OH group is a(n) ____ group

a. carboxyl b. hydroxyl c. amino d. methyl e. carbonyl

Biology & Microbiology

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

Biology & Microbiology

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

Biology & Microbiology

  Figure 39.9 ? 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

Biology & Microbiology