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11

This is a brief treatment of your question, specifically: the fact its solid form is less dense than its liquid form - is extremely important. ...crucial for the development of life. I can't speak to the importance of this property in the development of life (as I don't know the exact conditions of the world when life began, and therefore the role ...


4

I am completely shooting in the dark here, but do you mean the ones between 1:06 - 1:13 minutes in the video? (After Hammerhead and before Baby and Mama white Shark :) ) SPECIES IDENTIFIED: Pseudorca crassidens (False Killer Whale) Matching image from the internet (used for identification): Courtsey: UAE Dolphin Project PS: Images are screenshot ...


3

This is purely a psychological response, and it does not help in decreasing the speed of CO2 level rise. As CO2 level in your blood rises, you instinctively want to breath out the 'bad' air and breath in fresh one. The latter is impossible under water, but the former eases you psychologically a little; you have "started doing something" with your predicament ...


2

Yes, according to calculations presented here and here the conclusion is that: The O2 diffusion coefficient in saturated air (15% oxygen) is 5,700 to 10,800 times greater than in water (60°C and 20°C respectively). And here is a paper using this difference to investigate the transfer of O2 through the tracheal system of a click beetle.


2

I'd say that unihemispheric sleep and adaptations like it really are sleep - the brain activity on one side of the brain gives a characteristic sleep pattern. It certainly must satisfy the needs of an aquatic mammal like a dolphin or a whale since they have to be partially conscious to breathe by surfacing regularly. It does seem to affect the brain ...


1

To simplify, acidification of oceans is due to excess anthropogenic carbon dioxide CO2: H2O + CO2 → H2CO3 → H+ + HCO3- Seawater is naturally saturated with another base, carbonate ion (CO32-) that acts like an "antacid" to neutralize the H+, forming more bicarbonate. CO32- + H+ → HCO3- You want to alkalinize the ocean by dumping CaCO3. That ...


1

This answer may not be professional, but I think that if the marine life were born and raised in a reef surrounded by hard water they would most likely adapt to it and be fine. This is why if a human were to be raised on mars, he would find it impossible to walk on earth as the difference in gravity would be too much.


1

I suppose that it depends on how sleep is defined. If we define it a a mechanism by which the brain repairs itself in an altered state, then, yes they do indeed sleep. Just not with all of their brain at once.


1

These are different things. Nitrogen Narcosis or more commonly Gas Narcosis is the narcotic effect of gasses like Oxygen and Nitrogen under pressure. The effects are most prominent under 30m and commercial/technical dives doing dives to 40/50m on air tend to experience the effects most. (Narcosis is managed by adding an inert gas - in most gases Helium - ...



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