** 2013 Biology HL Before/After **

yournerd

That was awful paper

sganyfx

weirdspider wrote: »

Ohh I said take a nest, weigh it, let the birds add the cigarette filters then reweigh the nest.

I wrote, "count them" the only accurate way I guessed.

RabbitHearted

woopah92 wrote: »

Time on the x-axis and volume of froth produced on the y-axis.
The boiled catalase line was just above the x axis and remained constant. The unboiled catalase line was rising and eventually levelled off.

this is exactly how i did my graph

11Charlie11

sganyfx wrote: »

Dog - It's metabolism as it is an endotherm
Lizard - It's environment as it is an exotherm.

Was the question not just for dogs? I said respiration as their source of heat and for what name is given to dog I said endotherm and lizard as ectotherm.. Anyone know if that's right? .. I had at first mammals and reptiles

RabbitHearted

sganyfx wrote: »

I wrote, "count them" the only accurate way I guessed.

i said wait until the birds abandoned the nest and take it apart to weigh it :P

Slow Show

Actually lads f*cking hell I did all three parts of the ecology question and the other two went loads better but good lord what was up with those cigarette filter questions? It really felt like my general knowledge was being tested as opposed to anything to do with Biology? Which probably isn't the case but really, it all felt very wishy-washy and silly.

Also ugh think I said endoderm and ectoderm for that short question, stupid germ layers.

Lucan Bohs

Short Q 4 was a bitch. Did any one get it?

How could you tell it was a modified stem a) externally and b) viewing it under a microscope?

Daughter cell haploid or diploid?

Evidence that sexual reproduction had taken place?

One method to produce new plants?

sganyfx

Anyone else love the random plant question in the cigarette filter question?

woopah92

11Charlie11 wrote: »

Was the question not just for dogs? I said respiration as their source of heat and for what name is given to dog I said endotherm and lizard as ectotherm.. Anyone know if that's right? .. I had at first mammals and reptiles

Respiration is a source of heat, I put that down 'cause I remembered a similar question that had been asked before and respiration was an answer Other ones could have been like the liver, metabolism etc

Lucan Bohs

sganyfx wrote: »

I wrote, "count them" the only accurate way I guessed.

I said count how many empty cigarette fillers are around the nest. :P

weirdspider

Slow Show wrote: »

Actually lads f*cking hell I did all three parts of the ecology question and the other two went loads better but good lord what was up with those cigarette filter questions? It really felt like my general knowledge was being tested as opposed to anything to do with Biology? Which probably isn't the case but really, it all felt very wishy-washy and silly.

Also ugh think I said endoderm and ectoderm for that short question, stupid germ layers.

Haha F it, me too. You do chemistry too, right? How about endo and exothermic reactions thrown in to confuse all these terms even more...

Slow Show

Short Q 4 was a bitch. Did any one get it?

How could you tell it was a modified stem a) externally and b) viewing it under a microscope?

I went a bit mad for externally and was like 'presence lenticels (can you even see them), petioles, attached to leaves blah blah' under the microscope I said vascular bundles arranged in rings.
Daughter cell haploid or diploid?
Haplod. For the reason I just pretty much explained it was meiosis blah blah not sure how I worded it but think it was OK.

Evidence that sexual reproduction had taken place?
Presence of fruit I think?

One method to produce new plants?
Grafting/layering/cutting/micropropagation?

Anyone confirm/find fault with this?

Lucan Bohs

weirdspider wrote: »

Haha F it, me too. You do chemistry too, right? How about endo and exothermic reactions thrown in to confuse all these terms even more...

Ditto. Thought I was great remembering the difference between the 2 only to use them in the wrong bleedin' Q

Slow Show

weirdspider wrote: »

Haha F it, me too. You do chemistry too, right? How about endo and exothermic reactions thrown in to confuse all these terms even more...

Hahaha I guarantee you I'll end up drawing an energy profile for an ectothermic reaction on Tuesday. :L

weirdspider

Slow Show wrote: »

Short Q 4 was a bitch. Did any one get it?

How could you tell it was a modified stem a) externally and b) viewing it under a microscope?

I went a bit mad for externally and was like 'presence lenticels (can you even see them), petioles, attached to leaves blah blah' under the microscope I said vascular bundles arranged in rings.
Daughter cell haploid or diploid?
Haplod. For the reason I just pretty much explained it was meiosis blah blah not sure how I worded it but think it was OK.

Evidence that sexual reproduction had taken place?
Presence of fruit I think?

One method to produce new plants?
Grafting/layering/cutting/micropropagation?

Anyone confirm/find fault with this?

1. I said the daughter plant is attached to the mother plant via a horizontal runner
I said you can see the mother/daughter plants share the exact same DNA
2.I said diploid as it didn't need to be haploid as no sex.reprod was taking place
3.I said seeds
4.Microprop

Lucan Bohs

What is the chemical nature of hormones?

weirdspider

Slow Show wrote: »

Hahaha I guarantee you I'll end up drawing an energy profile for an ectothermic reaction on Tuesday. :L

Or is it endodermic?!

11Charlie11

Lucan Bohs wrote: »

What is the chemical nature of hormones?

Protein?
Did anyone else just about get it finished on time.. I did all section 1 and 2 but only 4 from section 2 ..

sganyfx

Lucan Bohs wrote: »

What is the chemical nature of hormones?

Proteins.

internet_user

sganyfx wrote: »

Dog - It's metabolism as it is an endotherm
Lizard - It's environment as it is an exotherm.

is it lizard exotherm? i thought it was ectotherm :L

woopah92

Lucan Bohs wrote: »

What is the chemical nature of hormones?

I believe they are proteins. But if they are steroid based, then they are lipids.

Scuid Mhór

11Charlie11 wrote: »

Protein?
Did anyone else just about get it finished on time.. I did all section 1 and 2 but only 4 from section 2 ..

I did every question on the paper :cool:

Lucan Bohs

For the sexual reproduction does zygote formation occur in the Fallopian tube or?

Jordan537

a lizard is indeed ectotherm with a dog being endotherm

internet_user

Lucan Bohs wrote: »

What is the chemical nature of hormones?

i said nitrogenous, not sure if correct!

sganyfx

internet_user wrote: »

is it lizard exotherm? i thought it was ectotherm :L

Exotherm or ectotherm is correct, same meaning.

RML

Lucan Bohs wrote: »

What is the chemical nature of hormones?

I wrote pH 7
I'm guessing that's wrong too!

weirdspider

Lucan Bohs wrote: »

For the sexual reproduction does zygote formation occur in the Fallopian tube or?

Yup!

CatEyed92

I have studied hard this year and so far I have sat english, geography and biology.
State exams are screwing people out of college places this year from the looks of things....
There was never a year things were so experimental or badly phrased!!

/rant

SQ were very unfair tbh

RML

In relation to an enzyme, explain the term optimum activity.
What did you guys write for this?