#Question id: 7115
#Unit 5. Developmental Biology
The ability of the sea urchin embryo to regulate its development illustrates the fact that there are maternally-determined differences along the animal-vegetal axis that are necessary for normal development. Which of the following statements about regulation in sea urchin embryos is consistent with that fact?
#Question id: 28549
#Unit 5. Developmental Biology
#Question id: 1982
#Unit 4. Cell Communication and Cell Signaling
These cells are involved in cell-mediated immunity, and they respond to class I MHC molecule-antigen complexes:
#Question id: 3744
#Unit 3. Fundamental Processes
Deaminated bases must be removed from DNA because
#Question id: 9611
#Unit 9. Diversity of Life Forms
If, someday, an archaean cell is discovered whose SSU-rRNA sequence is more similar to that of humans than the sequence of mouse SSU-rRNA is to that of humans, the best explanation for this apparent discrepancy would be