Answer:
If the water is initially hot, cooled water at the bottom is denser than the hot water at the top, so no convection will occur and the bottom part will start freezing while the top is still warm. This effect, combined with the evaporation effect, may make hot water freeze faster than cold water in some cases.
Explanation:
<span>The nearness of an indwelling urinary catheter and a
ceaseless bladder water system are standard postoperative desires after a TURP;
they accommodate hemostasis and urinary discharge. A stomach entry point and
dressing are available with a suprapubic, not transurethral, prostatectomy.
After a TURP the customer at first can expect hematuria and some blood
coagulations; the persistent bladder water system keeps the bladder free of
clumps and the catheter patent.</span>
Answer:
The cell membrane (also called the phospholipid bilayer or the plasma membrane) is one of the most important structures a cell has. If you think of the cell as a really popular nightclub, the membrane is the bouncer. It decides what enters and exits the cell.
There is only one measure of "evolutionary success": having more offspring. A "useful" trait gets conserved and propagated by the simple virtue of there being more next-generation individuals carrying it and particular genetic feature "encoding" it. That's all there is to it.
One can view this as genes "wishing" to create phenotypic features that would propagate them (as in "Selfish Gene"), or as competition between individuals, or groups, or populations. But those are all metaphors making it easier to understand the same underlying phenomenon: random change and environmental pressure which makes the carrier more or less successful at reproduction.
You will sometimes hear the term "evolutionary successful species" applied to one that spread out of its original niche, or "evolutionary successful adaptation" for one that spread quickly through population (like us or our lactase persistence mutation), but, again, that's the same thing.
