In anticipation of you starting to ask more questions as the exam gets closer I have reorgansied the pages to make it easier to read and edit.

biol 1 faq (nsfaq) part1
Please do not write any more questions on this page, although you should still be referring to it and reading it regularly.

biol 1 faq (nsfaq) part2
This page is now open for you to post questions and answers.

Indeed Voj, I do know the different forms of nitrogenous waste amongst animals.
Mammals: Urea
Pros: Not as toxic, uses less energy
Cons: Uses water supply
Aquatic Animals: Ammonia
Pros: Doesn't use energy or water supply & soluble
Cons: Toxic
Birds and (insects?): Uric Acid.
Pros: Uses Less water, Non-toxic
Cons: Uses a LOT of energy
Cool stuff OJ, you lead the way! VM