Fish and other aquatic organisms are exposed to many types of water pollutants, including metals such as aluminum. Although a low level of aluminum is found in unpolluted water, many lakes and streams have an increased level because of mining, sewage treatment, and accidental spills of toxic materials. Aluminum pollution can result in mass fish die-offs. Draw a graph similar to the one here showing how the results would be different if the experiment had been performed on marine bony fish in seawater. (Assume that the osmolarity of seawater is 1100 mOsm and the set point osmolarity of marine bony fishes is 290 mOsm.)

Video transcript

Hello everyone and welcome to today's video. So most marine animals are those more conformers and keep their bodies blank to the environment. Whereas most freshwater animals or those more regulatory and keep their bodies blank to the environment. I want you to pay attention to both the environment that they're in and this word that we see here is more conformers and also more regulatory. Well these freshwater animals are all small regulatory meaning that they keep their osmotic pressure in check in terms of their environment. So it changes. So what is the environment of these freshwater animals? They're in fresh water which is a high platonic environment because it does not contain many salutes. This is why it's a fresh water and not salt water because there is not a lot of salt dissolved in the water. So because of this, because the fresh water is going to be isotonic and there are always more regulators, they're going to be hyper tonic. So that is the answer that we're going to be putting here. Then we have the most marine animals are osmo conformers so they don't really need to regulate their internal osmotic pressure because of this, their internal osmotic pressure is going to be isotonic and this is going to be represented by answer choice. That is the end of the video. And I really hope this video helped you