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lol about 60, all askin the same question. xiao, that stuff u posted is not in the hsc syllabus.. according to the hsc textbooks, they all say that fish execrete ammonia, and that salt water execrete concentrated, and freshwater=dilute.. i might b wrong.. any1 else been tought urea for...

xiao, true: fresh water fish execrete dilute ammonia.. BUT salt water fish execrete concentrated ammonia.. i dnt think any fish does urea.. and abt the whole hypertonic/hypotonic thing: - freshwater fish are hypertonic to their surroundings, and - salt water fish are hypotonic to their...

lol, i still dnt get it.. is there any more info pple have on this d/p?

yea, the waste thing does throw me off to.. but the only products plant need in order to carry out photosynthesis is water and carbon dioxide.. wouldnt everything else be considered a waste as its not needed by the plant?

that question was in the 2003 independant exam.. that were ur teach got most of ur q's from?

ditto .. is it an actual book that avaliable for general purchase?

^ 10 weeks, so yea abt a term. . but its not every week, its spread out until the HSC exams..

1) define enantiostasis.. 2) give an example of it (theres a good example on HSC online- "when salt concentration is changed in the body fluid, this results in the reduced efficiency of an enzyme. To compensate for this change, pH is increased to boost the efficiecy of the enzyme) 3) an...

xlyem doesnt trasport organic substances though.. thats the phloem's job.

i think thats bull.. > 3 pple did it mate..

isnt its importance... just that theyd die without adapting to the regular changes in their environment?

C. a)organic compounds are transported in the xylem b) transport of materials in the xylem is both up anmd dodnw c) inorganic compounds and waste are transported in the xylem d) inorganic and organic compounds are transported in the xylem The xylem transports water and some mineral ions...

LOL i saw the pic *dances i saw the pic.. alrite ill shutup.. i jus happened 2 b in this forum by accident :D

lol *hides face*no... no i havent, we've done this core at school.. hehe, yep, kimmeh i have..

the social impact of scientific knowledge bout the human immune response.... yes, thats a question. now, answer it.

http://home.swiftdsl.com.au/~kewpid/exams/ try that

dude jus curious, are u even a mod?

our teacher does jack all.. she pretty much is sittin down the entire lesson reading out of the book, and if we ask her to explain something, the first thing shell say is "what outcome is this" and read the answer/explanation outa excel or some other book.... either that or she 'pretends' not to...

LOL is she jokin around or does she really suc at english?

muscle spasms are caused/triggered by: stress, anxiety a diet deficiency drug overdose drug side effect um... i dnt think theres such thing as o2 defincincy mate..ur body develops adaptations overtime to deal with such things (eg: increasing haemoglobin levels in blood, faster pulse...