<span style='font-size:17pt;line-height:100%'><span style='color:pink'>Good luck everyone!</span></span>
Answers to me by e-mail of PM by the 28th please.
1) Hybrid "Parrot" and "Flowerhorn" cichlids have raised an outcry as "frankenfish," yet some older hybrids of species are widely accepted. Of several familiar aquarium fishes, the only one definitely *not* a hybrid is
a) the Green Tiger Barb.
B) the Red Swordtail.
c) the "Sunset" Platy.
d) the "Sunset" Gourami.
2) That white gravel you just bought will raise the alkalinity of your water. You tested it in a saucer by covering some with vinegar, and it produced bubbles of
a) oxygen.
B) hydrogen sulfide.
c) nitrogen.
d) carbon dioxide.
3) During a long summer heat wave, you lower the water level in your Corydoras tank an inch every few days, until the water is only three inches deep. The temperature climbs to 80 degrees. Then, when the heat breaks, you quickly top up the tank with cool (70 degree) distilled water. Sound like a good way to get them to spawn?
a) Yes
B) No
4) Dense populations of cichlid fishes and severe competition for territory in rocky areas of Lake Malawi have created evolutionary pressure in favor of
a) mouthbrooding.
B) herbivory.
c) egg-scattering.
d) mass spawnings.
5) Do you have fish eggs in the aquarium, or are they snail eggs? The eggs are on plant leaves. You're pretty sure they're snail eggs, because
a) they're scattered singly or in pairs over the leaf.
B) they're bound together in a gelatinous mass.
c) you can see little black dots inside.
d) they're a clear golden color.
6) Two general characteristics of species of fish that habitually school: they show minimal intraspecific aggression and little sexual dimorphism.
a)True
B) False
7) Whether you call it Nandopsis cyanoguttatum or Herichthys cyanoguttatum, the Texas Cichlid or Rio Grande Cichlid is the only cichlid native to the U.S. ...And it is also the northernmost cichlid on the planet.
a) true. true.
B) false. false.
c) false. true.
d) true. false.
If your aquarium is recreating a small stream in undisturbed Amazonian rainforest, it would be *least* likely to contain. a) tangles of twiggy brush.
B) dark tea-colored water.
c) lush Amazon Swordplants.
d) a dense carpet of dead leaves.
9) Chloramines are increasingly replacing chlorine in our water supply. The traditional chemical in aquarium dechlorinators has been sodium thiosulfate. It neutralizes the chlorine in water, and it neutralizes the chlorine in chloramines too.
a) True
B) False
10) The "Weberian ossicles" are a series of small bones behind the head that aid certain groups of fishes in
a) perceiving sound.
B) keeping upright.
c) navigating in darkness.
d) swallowing prey.
