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Why do freshwater fish actively absorb salts if they gain a lot of water by osmosis? Wouldn't salt absorption attract even more water, causing it to burst?

Thanks so much!

Hey guys, So one thing that's freaking me out right now is using data to support your argument. My half yearly requires us to write two essays, one one Australia's place in the global economy and the other on our economy of our choice. There are all these trends and stats that we need to...

What about comparing the advantages and disadvantages of artificial blood compared to donated blood. If you were asked to evaluate the uses of one over the other, how many advantages and disadvantages would be enough to earn, say, 6/6 assuming it's a six marker. What other advantages and...

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Substances that filter into the glomerulus must be small enough to filter through. They include urea, water, solutes, ions, amino acids and glucose. Essential metabolites (solutes, ions, amino acids and glucose) are reabsorbed. They are actively pumped back into the blood vessels at the...

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Does anyone know the dependent and independent variables in the following experiments: 1. The effect of CO2 on pH - our school blew into water and added universal indicator to observe the change in pH. As expected, it went from neutral to slightly acidic. 2. Modeling natural selection - our...

That's correct. But stem cells are produced in the bone marrow and mature and differentiate to form other cells eg. Neurons, skin cells, etc. Specialisation is the role carried out by each cell

Hey guys, So I'm still unsure as to how you determine a and b in various conics equations/scenarios ie. b^2=a^2(1-e^2) for the ellipse and b^2=a^2(e^2-1) for the hyperbola. I understand that you let the "bigger value" represent a for the ellipse so that you get a fraction less than one when...

Yeah we had a similar thing for Robert Gray. We had the essay question in advance and an audio on the day of the exam. We had to take quotes from the audio and map them to the idea of discovery in the rubric, weaving the additional text into our prepared essay and making points of comparison...

Haha I had the same essay question for my AOS essay. I used the rubric as a guide and found that students need to consider how their texts challenge the assumptions of discovering and discoveries. Most people assume that discoveries are physical, involving some tangible realisation. Further...

What uni?? Tell me noww!

Hi guys, I'm doing some exercises that require the use of demoivre's theorem. It's pretty straightforward for the most part, but I've come across a question that says to "find the 4th roots of root2+root2i". I converted this into mod-arg form and let 2cis(pi/4)^16=rcis(theta), but I'm stuck...

Thanks heaps guys. Yeah that's one of the reasons as to why I thought they won't publish it in the SMH because it is technically a newspaper even if available electronically.

Hi guys, UAC says that main round offers will be available tonight for 2015 uni students but these offers won't be published in the paper. Is this because of privacy issues or are newspaper companies trying to save paper (and money)? Will they publish it on the net like they did last year...

It's better to type your notes because it is more efficient and you can colour code them to boost memory retention. Have you read any texts for advanced English? If you haven't done much for English it's fine, but reading expands your vocabulary and your brain adjusts to automatically emulate...

Guys stop! My mum's gonna filter this website for watching food porn.

Thank you so much. It makes a lot more sense now.

Dixon's textbook says that microeconomic policies can worsen economic growth, employment and external stability in the short-term. How is this so and why does the economy recover in the long-term? While these objectives aren't pertinent to the syllabus area in topic 4, would you agree that...