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Explain how mutations in DNA can lead to the generation of new alleles? Mention an example in your response. 4 marks

Need to know why the answer is D. Any help is greatly appreciated

How does magnetic field bend Cathode Rays. So if you put a magnet next to the maltese cross, how is the shadow going to be deflected?

The question (I have the two triangles drawn in my working out): My working out: Why was my answer getting the ratio of a:b as 5:7, when the answers said it was 7:5. Any help would be greatly appreciated.

How do I write a good risk assessment in a HSC science such as Chemistry. Do I: State risk Say What to do if risk happens, Say What to do to minimize risk Does that cover everything?

Equal volumes of equimolar solutions: H3PO4 + NaOH --> NaH2PO4(aq) + H2O As the relative amount of OH- increases, you could get H3PO4 + 2NaOH --> Na2HPO4(aq) + 2H2O And with a substantial excess of NaOH, then you get H3PO4 + 3NaOH --> Na3PO4(aq) + 3H2O Do we need to know all three...

Is the Dotpoint HSC Biology Book - by Kerri Humphries, any good? I have only done a few pages of it and was wondering if it was worth spending some time answering the questions in there. There are only like 7 weeks until the HSC starts so should I spend a few hours going through the dot points...

CO2(aq) + H2O(l) ⇌ H2CO3(aq) Do we have to know why this happens?

Combustion of Ethanol: Is ethanol a liquid or gas here? Apparently from C1 to C5 Hydrocarbons are all gases at room temperature. So does that mean when i write the equation of combustion of ethanol it would be a gas?

I have an exam on tuesday so need to know the equillibrium constant. I know if K<0.001 then it lies to the left and almost no reaction occurs. and if K>1000 then it lies to the right and almost goes to completion. But what if K is between these values? And i Also saw a question: K = 19.9 at...

This equation represents a common redox reaction. Cr2O72–(aq) + 14H+(aq) + 6Fe2+(aq) → 2Cr3+(aq) + 6Fe3+(aq) + 7H2O(l) What is the oxidising agent in the reaction? How would I figure this out? I know that an oxidising agent is one that reduces but how do I write out the ionic...

Alright. I always get confused which values to use as l0, t0, and m0...and which values to use as lv, tv, and mv. lv, tv, and mv, is the MOVING ONE right? But then if there is a question asking from the MOVING e.g ROCKET SHIP perspective, Does that mean the rocket sees the Earth moving so the...

can someone explain to me why the answer is C. I also seem to struggle with the concept of what BACK EMF actually is.

Just wondering if I could Masterchef as a related text for Discovery. Because there was SOOOO MUUUCHHH of the discovery rubric in in this year's masterchef, especially the finale.

I'm doing HSC Chemistry and I don't know when to put state sign a gas, or liquid, or solid. The only one I know is aqueous because it means a solution / dissolved in water. Is there any trick to knowing state signs? I have CSSA trial on Friday and I'm stressing over this.

Question: Sexual Reproduction leads to greater variation within a species. Identify the two sources of variation that occurs within meiosis ans explain what they are and how they lead to a greater number of genetic variance within offspring. 6 MARKS This was my answer which received 4/6. I lost...

I am studying Hamlet, and I am wondering what is considered DRAMATIC TECHNIQUES?

The dot point on cracking says: "identify the industrial source of ethylene from the cracking of some of the fractions from the refining of petroleum" Is it sufficient just to learn about catalytic cracking or do i need to know thermal cracking as well?

I have a report due tomorrow so any help is appreciated greatly. The report is on finding sulfate content of lawn fertiliser experiment...and i have 2 question: 1) What are the assumptions made that the experiments validity is dependant on? and 2) what is the difference between...

I recently took part in the nsw titration competition and in the first part, we put unknown concentration of NaOH in burette, and 25mL of 0.1292mol/L of HCL in the conical flask. Then we put 3 drops of phenolphthalein indicator into the conical flask, and let the NaOH run into the conical flask...