#Question id: 15656
#Unit 13. Methods in Biology
#Question id: 5682
#Unit 5. Developmental Biology
During prevention of polyspermy in sea urchin the shift from ___1___ to __2____is the result of a small influx of Na+ into the egg through newly opened sodium channels. Sperm cannot fuse with egg cell membranes that have a ___3___ resting potential, so the shift means that no more sperm can fuse to the egg.
#Question id: 32370
#Unit 2. Cellular Organization
#Question id: 941
#Unit 1. Molecules and their Interaction Relevant to Biology
Which of the following is an amide-containing amino acid?
#Question id: 28177
#Unit 5. Developmental Biology
Which of the following development is represented by autonomous specification?