#Question id: 7222
#Unit 5. Developmental Biology
During development of sea urchin, The fates of the different cell layers are determined by which process?
#Question id: 11452
#Unit 7. System Physiology – Animal
A given photon of light may trigger an action potential with thousands of times more energy because the signal strength is amplified by ________.
#Question id: 1326
#Unit 4. Cell Communication and Cell Signaling
Which cellular junction will be most useful in preventing the movement of material between cell membranes?
#Question id: 18953
#Unit 13. Methods in Biology
#Question id: 12236
#Unit 10. Ecological Principles
A plant species arrives at an island for the first time, where it is exposed to a new set of pollinators. Over the course of 20 generations, the characteristics of its flowers change. The figures above show the frequency distribution of petal length in the original colonizing population (Figure 1) and 20 generations later (Figure 2). Which of these explanations is consistent with the observed change in petal length?
