Which of the following conditions will most likely result in anoxia effect and may kill the largest number of fish in a pond?\n\na) a cold day during an algal bloom\nb) a hot day during an algal bloom\nc) a cold night during an algal bloom\nd) a hot night during an algal bloom\ne) a cold day
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B, Algal blooms first create some dissolved oxygen, but then they over populate since they're free floating, block the sun, use all the DO and the fish die. HA! I will not fail that AP bio exam!
630324
5... how do you drown a fish?\n\nits a convertible and the top is down?
634839
since the heat evolced is dissipated in 100 ml in the first case (by 2 g of NaOH) and in 200 ml of water in the second case (by 4 g of NaOH) the net change in the temperature of water remains same. hence 'a' is the correct answer\n answer : 'a'
406334
a) a lower freezing point than pure water
87446
Stinky,\n\nYour goldfish is sleeping with my guppies in the Big Fish Tank of the sky, but I'm sure he enjoyed the beer and pepperoni we gave him.
601101
no, because fish have gills (breathe on the outside) unlike us we have lungs in the inside.  In my aquarium tank I have a small mouth Bass & Yellow Perch, when i feed my bass minnows he would have three minnows in it's mouth (minnows literally sticking out it's mouth)/ my perch as well.  They will swim around with half a minnow sticking out it's mouth and act like it's no big deal.  You will see this with bluegill they will take the worm and swim around with it hanging out it's mouth.  I just feed my fish (thanks for reminding me) and I took pictures so if you want to see them just e-mail and I'll send it to you.  \n-About the dead smaller fish stuck in it's throat some fish I catch may puke up fish due to exhaustion.  When i go fishing for walleyes and northern pike I've had them cough up fish on me.  I've had bass do the same.  \n-Death? He could have died due to foul hooking (not meaning snagging) but if it hook in the middle or back of the throat can kill any fish especially if it's kept out of the water to long, just cut the line and release.  It doesn't work out all the time.
292426
A. Condensation. One might say D. but this would be wrong because the vapour has first to condense into tiny droplets (in clouds) which then clump together to form rain or snow (precipitation).\n\nNote that the other answers are 'blinds'. Nitrogen fixation has nothing to do with the water cycle. Recycling refers to re-using waste material. They are put there to test whether you know absolutely nothing, have heard some words about it, understand a little or have a good grasp of the subject.\n\nIf the question were marked out of 2, I would give 2 marks to A., 1 mark to D., maybe half a mark to C. if I felt the rest of the answers in the paper showed promise and no marks to B.\n\nWhen you are doing tests, it very often helps to ask, "Why are they asking this question?", "What piece of knowledge are they testing?" and "Why these particular options?"
176127
The spawning fish is a Grunion.\n\nOn the second question I can't help you.
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The first sentence is wrong.  It can be corrected as: The word "selfish" has nothing to with fish.\n\nThe second sentence is grammatically correct, but it doesn't make any sense.\n\nThrough these two sentences I think a teacher is trying to tell his students that the word "selfish" has nothing to with "fish" although both the words have "fish" in them.\n\nAlternatively, you can say "shellfish" has something to with "fish"
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Guessing......red tides in the ocean are caused by an algae when conditions are right (low oxygen i believe) It may be the same in a waste water stabilisation pond, they might use a similar algae to help break down the waste materials.
31267
Global warming.  It is killing all the frogs too!\n\nIf the frogs get eliminated...what's next!
59034
When the temperature of the water in the bottle approaches 32 degrees farehheit (the temperature where water freezes) is expands.  This pre-freeze expansion can rupture most nearly full containers.\n\nThe one good thing about this unusual physical phenomenon is that this is the reason that tce forms on the tops of lake or pond water.  This enables people to skate on the ponds in winter time.  The top layer of water freezes, while the lower water stays in a liquid form.
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In the trade its referred to as an HAB--Harmful Alge Bloom. Occasionally, the algae grow very fast or "bloom" and accumulate into dense, visible patches near the surface of the water. "Red Tide" is a common name for such a phenomenon where certain phytoplankton species contain reddish pigments and "bloom" such that the water appears to be colored red. The term "red tide" is thus a misnomer because they are not associated with tides; they are usually not harmful; and those species that are harmful may never reach the densities required to discolor the water.\n\nUnfortunately, a small number of species produce potent neurotoxins that can be transfered through the food web where they affect and even kill the higher forms of life such as zooplankton, shellfish, fish, birds, marine mammals, and even humans that feed either directly or indirectly on them. \n\nhttp://www.whoi.edu/science/B/redtide/whathabs/whathabs.html\n\nhttp://en.wikipedia.org/wiki/Red_tide\n\nhttp://seagrant.gso.uri.edu/factsheets/redtide.html\n\nhttp://www.whoi.edu/redtide/
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B.  Donating electrons to photosystem II.\n\nSee discussion of water photolysis in the first source given below.\n\nAnswer A is wrong because NADPH is already reduced, and doesn't "want" any more electrons.  NADP+ is the oxidized form, which reacts with the electrons and hydrogen ions produced by the photolysis of water to form NADPH.\n\nAnswers C and D are wrong because water is an electron donor (not an electron acceptor)  in photosynthesis.  Water is photolysed, producing molecular oxygen, hydrogen ions, and electrons:\n\nH2O -> 2H+ + 2e- + 0.5O2
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phytoplankton produce oxygen, not breathe it (A & B wrong)\nnekton are bigger than plankton so i don't think they feed off of them (C wrong)\nzooplankton feed on other plankton, which is technically what nekton is (by my guess D is right)
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Harmful algal blooms are occurring more often and in more regions across the nation than ever before. These intense population explosions of algae can kill marine life, clog waterways, and create conditions that impact human health. While algal blooms are a natural phenomenon, it is believed that human activities, such as nutrient excess in runoff, may be triggering their increasingly common occurrence.
197763
Many of the microorganisms in the pond water are actually plants.\n\nThe microscopic organisms living in the water column are usually refered to as plankton.  The phytoplankton are the microscopic plants, while the zooplankton are the microscopic animals.  The phytoplankton are the majority of the mass, mostly single celled algae and diatoms.