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Higher Biology


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Poll: What do you think you'll get (29 member(s) have cast votes)

What do you think you'll get

  1. A (15 votes [51.72%])

    Percentage of vote: 51.72%

  2. B (9 votes [31.03%])

    Percentage of vote: 31.03%

  3. C (3 votes [10.34%])

    Percentage of vote: 10.34%

  4. DToo difficult, none of the above! (2 votes [6.90%])

    Percentage of vote: 6.90%

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#41 werlop

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Posted 18 May 2005 - 05:36 PM

QUOTE(cork screw @ May 18 2005, 06:35 PM)
did you notice the picture? above it. sort of showing the stages where the cell changed to xylem

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I know it was there, I can't remember what it was like though.
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#42 cork screw

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Posted 18 May 2005 - 05:37 PM

well i thought that was kind of a clue.

as xylem are non living.

what did you say about the snake?

#43 *Suz*

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Posted 18 May 2005 - 05:42 PM

I thought that whole page on the xylem was confusing on the whole, i'll be lucky if i pick up a few marks here and there for that one...
And the person who mentioned crashing the higher, im in the same situation and found that question particularly difficult as it's something thats taught in standard grade and talked very little of in the higher course

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#44 werlop

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Posted 18 May 2005 - 05:44 PM

QUOTE(cork screw @ May 18 2005, 06:37 PM)
well i thought that was kind of a clue.

as xylem are non living.

what did you say about the snake?

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Do they have no nucleus then?



I said if the snake moved about it would heat up, think about it, if you exercise you get warmer.
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If you can keep your head when all about you
Are losing theirs and blaming it on you,
If you can trust yourself when all men doubt you
But make allowance for their doubting too,
If you can wait and not be tired by waiting,
Or being lied about, don't deal in lies,
Or being hated, don't give way to hating,
And yet don't look too good, nor talk too wise:
Yours is the Earth and everything that's in it,
And--which is more--you'll be a Man, my son!

#45 bigears1

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Posted 18 May 2005 - 06:06 PM

I put something about it lying in the sun to heat up, not too sure though.
Xylem is taught at standard grade, just the basics - it is not living, there for support, mineral uptake etc.... but not differentiation, you probably were disadvantaged on that question since you didnt know much about it, but i think most people found it tricky, i certainly did!

#46 hippo

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Posted 18 May 2005 - 06:06 PM

For the xylem I put the nucleus disintergrates and lignin forms on cell wall to form a tube, don't know if thats what they were after or not.
The snake question i put the would rest in direct sunlight (I think thats right! dry.gif )

anyone know the question about what joins with acetyl before it goes to the citric acid cycle. I took a stab at CO2 but i know thats wrong

#47 Scott_Cameron

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Posted 18 May 2005 - 06:11 PM

For the snake question I said it would move to seek warmer environment. I wasn't really sure, however ...

As for the xylem question, I originally put down "Develops other cell structures, eg. Cell wall", but then I replaced it with some sort of crazy answer afterwards. ^^;;

Knowing that the essay questions didn't go fantastic, and looking at the breakdown of marks, now ... I'm started to get worried I've even made the C. Here's hoping so. I think I did well on the calculation / graph based questions, though. ( With the exception of that blood solute one. ) So that might have made some marks up.

#48 lauralaura

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Posted 18 May 2005 - 06:13 PM

QUOTE(hippo @ May 18 2005, 06:06 PM)
For the xylem I put the nucleus disintergrates and lignin forms on cell wall to form a tube, don't know if thats what they were after or not.
The snake question i put the would rest in direct sunlight (I think thats right! dry.gif )

anyone know the question about what joins with acetyl before it goes to the citric acid cycle.  I took a stab at CO2 but i know thats wrong

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i'm also a bit :s bout that one. i said a 4-carbon compund but i wasn't sure betweent that and coA, whever CoA is. Ohoh.

#49 bigears1

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Posted 18 May 2005 - 06:13 PM

QUOTE(hippo @ May 18 2005, 06:06 PM)
For the xylem I put the nucleus disintergrates and lignin forms on cell wall to form a tube, don't know if thats what they were after or not.
The snake question i put the would rest in direct sunlight (I think thats right! dry.gif )

anyone know the question about what joins with acetyl before it goes to the citric acid cycle.  I took a stab at CO2 but i know thats wrong

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I took a go at CoA as it was Acetyl CoA before ?????

#50 cork screw

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Posted 18 May 2005 - 06:25 PM

Huh, not really understanding your question.

If i guessed what part you're on, 4 carbons

you know i'm beginning to frazzle, stress from the bio exam. sad.gif


#51 YIC

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Posted 18 May 2005 - 06:41 PM

I said a carbon molecule with 4 carbons.

For the xylem questio I talked about the contents of the xylem disintegrating into a hollow tube and also the lignin being deposited onto the xylem wall.

For the snake question I said that it would contract (e.g curl up) to reduce heat loss

#52 cc100

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Posted 18 May 2005 - 06:58 PM

QUOTE(Soph.E. @ May 18 2005, 04:51 PM)
oh did anyone get like four C's in a row in the multiple choice section - the SQA have never had more than 3 of a letter in a row before (as far as I know!) so just wondering if I really did go wrong with one of them?!

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Yeah I remember getting quite a few C's in a row and thinking hmmmm unsure.gif dunno whether that's right, lol.
But I think it went OK - it's good to know that all of the qs I was stuck at noone else seemed to get either!! The ADH question confused me too. I was trying to use my common sense and answer from what I knew about ADH, but then I convinced myself that I had to use the graph and confused myself even more! The snake question made me laugh because I was trying to think about how it would heat itself up, and I thought about writing "exercise." Then I got a mental picture of a snake doing its exercises which made me hesitate! laugh.gif My pal says she saw a programme on it, and the snake lies in the sun to get warm.
Essays were not bad - I did the one on monitoring species and density dependent factors, and the photosynthesis one. Hope I've done well...

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#53 UAE_SOUL

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Posted 18 May 2005 - 06:59 PM

QUOTE(bigears1 @ May 18 2005, 07:13 PM)
QUOTE(hippo @ May 18 2005, 06:06 PM)
For the xylem I put the nucleus disintergrates and lignin forms on cell wall to form a tube, don't know if thats what they were after or not.
The snake question i put the would rest in direct sunlight (I think thats right! dry.gif )

anyone know the question about what joins with acetyl before it goes to the citric acid cycle.  I took a stab at CO2 but i know thats wrong

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I took a go at CoA as it was Acetyl CoA before ?????

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the answer is coA
the exam was OK the multiple choice section was the trickiest in my opinion

#54 cork screw

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Posted 18 May 2005 - 07:02 PM

did anyone use the word ahersion in the plant question?? (with the xylem differentiating)



#55 hippo

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Posted 18 May 2005 - 07:13 PM

Oh yeah about the water molecule movement or something?! I did cohesion unsure.gif

#56 cork screw

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Posted 18 May 2005 - 07:16 PM

what was the Q??

cohersion is when the substances are of the same, and adhersion is dissimilar!!


#57 hippo

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Posted 18 May 2005 - 07:20 PM

I cant remember properly but it was something like what is the movement of the water molecules up the stem due to or something similar. My question sounds like it could have been root pressure so I'll just hope I remembered the question wrong

#58 cork screw

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Posted 18 May 2005 - 07:22 PM

Oh god, i think i did really bad!! did you do the multiple choice in pen??

It was really weird having to do it that way.

#59 *Suz*

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Posted 18 May 2005 - 07:23 PM

QUOTE(cork screw @ May 18 2005, 08:02 PM)
did anyone use the word ahersion in the plant question?? (with the xylem differentiating)

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I used Cohesion because that describes how water molecules tend to stick together....im probably wrong though lol.

The acytel one was a thinker as well, i put CoA at first then went back at the end and changed it to '4C'....wishing i hadn't now sad.gif
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#60 hippo

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Posted 18 May 2005 - 07:25 PM

Yeah I didnt like that either I kept having to double check I had put it in the right slot! I came out the exam relatively confident about it but now I keep getting flash backs of putting the wrong answers so im a little nervous, dont know what about tho cause I dont need to pass or anything
Just have to forget about it and see in August biggrin.gif





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