The large number of alveoli in lungs improve diffusion by
a. decreasing the distance for diffusion
b. increasing the surface area for diffusion
c. increasing the concentration difference
d. changing the diffusion constant

Depending on the organism the number of in a cell may change

Recent research by marine biologists suggests that bottlenose dolphins have names for themselves. scientists played sounds they had identified as the names of particular dolphins, putting them through a synthesizer so that they did not sound like the voices of particular dolphins. the researchers found that dolphins would respond to the names of other dolphins that they were related to or associated with, but they ignored the names of strangers. this discovery suggests a much greater degree of self-awareness in aquatic mammals than was previously suspected. if this research holds up, what does it suggest about dolphins?

In general, are there any major differences that you can see? explain