#Question id: 23036
#Unit 12. Applied Biology
#Question id: 6967
#Unit 5. Developmental Biology
Gastrulation in sea urchins, Drosophila, and Xenopus all begin with a change in cell shape, in which the apical surface of an epithelial sheet contracts. This process is called:
#Question id: 5650
#Unit 5. Developmental Biology
Thalidomide, now banned for use as a sedative during pregnancy, was used in the early 1960s by many women in their first trimester of pregnancy. Some of these women gave birth to children with limb and organ deformities, suggesting that the drug most likely influenced ________.
#Question id: 4322
#Unit 3. Fundamental Processes
If a particular operon encodes enzymes for making an essential amino acid and is regulated like the trp operon, then
#Question id: 1052
#Unit 4. Cell Communication and Cell Signaling
The correct order for the stages of a phage infection is: