BIO310 : Test 2
Final exam- double the short answers and 45 MC
1. Why fresh water teleost fishes do not drink water?
Organism in freshwater- water moves in and salt moves out. Most of
these organisms have hyperosmotic and it is fresh water environment
so less solutes, So they have a challenge that water will go across the
gills and so don’t have to drink water. Their challenge is not to have
too much water in them because water goes through their gills
anywhere. So they don’t want to get more water.
2. Weddell seals have dives that last an hour or longer, During the
dive lactate could accumulate in the seals blood leading to a
change in PH. This doesn’t happen un