Biology P33 8 Nov

[Idolfanatic95]

I wrote about the vascular bundles like in K1 they were in the centre and the xylem was start shaped. I wrote about the absence of pith and cambium in K1. and then the thickness of cortex. and also that there were more vascular bundles present in fig 2.4 than K1

star shaped**

 

[xtremeforums]

I wrote about the vascular bundles like in K1 they were in the centre and the xylem was start shaped. I wrote about the absence of pith and cambium in K1. and then the thickness of cortex. and also that there were more vascular bundles present in fig 2.4 than K1

in latest markschemes, for comparisons, they require one similarity too...
So for that, i wrote both are round in shape...

i wrote about the number of vascular bundles too... and the position.

 

[Irfan1995]

Idolfantic95, you can't say that pith is not present. What I did is say that the pith in K1 is smaller than the pith is Fig 2.4

 

[TCHS]

I wrote about the vascular bundles like in K1 they were in the centre and the xylem was start shaped. I wrote about the absence of pith and cambium in K1. and then the thickness of cortex. and also that there were more vascular bundles present in fig 2.4 than K1

My answer was less detailed than yours so I wrote about the thickness of the cortex in K1, the narrower lumen of the vascular bundle in K1 (which is probably wrong because I have no idea whether 'lumen' is the right word choice) and I wrote about thinner epidermis in fig 2.4 i think.

 

[TCHS]

in latest markschemes, for comparisons, they require one similarity too...
So for that, i wrote both are round in shape...

i wrote about the number of vascular bundles too... and the position.

Yes but they asked for 'observable DIFFERENCES'. If they had asked to compare & contrast, perhaps then similarities would have given marks? :S

 

[Irfan1995]

The usage of lumen is right in TCHS's case. It refers to the hollow space in the vessel. However, you cannot fairly compare as their magnifications could be different. We have no information about that, so there's no way we can be sure.

 

[Idolfanatic95]

My answer was less detailed than yours so I wrote about the thickness of the cortex in K1, the narrower lumen of the vascular bundle in K1 (which is probably wrong because I have no idea whether 'lumen' is the right word choice) and I wrote about thinner epidermis in fig 2.4 i think.

Im not sure about the lumen thing

 

[Irfan1995]

Looking at mark schemes, they only credit similarities if they ask for them.

 

[Idolfanatic95]

Idolfantic95, you can't say that pith is not present. What I did is say that the pith in K1 is smaller than the pith is Fig 2.4

I could not see any pith in K1 so i wrote.

 

[Idolfanatic95]

in latest markschemes, for comparisons, they require one similarity too...
So for that, i wrote both are round in shape...

i wrote about the number of vascular bundles too... and the position.

They asked for differences. If they jus written compare, then Atleast one similarity was MUST.

 

[xtremeforums]

And the hypothesis was correct right?

 

[Idolfanatic95]

And the hypothesis was correct right?

Yep the test results proved it

 

[xtremeforums]

hmm, and what did you write for the question after that?
The one about the enzyme and different temperatures?

 

[niya15]

guys wht abt the part 2 of 2nd question ?? 5 root cell...

 

[Idolfanatic95]

hmm, and what did you write for the question after that?
The one about the enzyme and different temperatures?

Uh cud u write the exact ques, i cant remember this one

 

[Idolfanatic95]

guys wht abt the part 2 of 2nd question ?? 5 root cell...

Yeah we were supposed to draw 5 adjacent cells of the xylem, as it was present in the centre. Five hollow cells with double layer.

 

[xtremeforums]

guys wht abt the part 2 of 2nd question ?? 5 root cell...

draw any 5 adjacent cells... should be large...
and label the cell wall, and cell membrane..

 

[xtremeforums]

Uh cud u write the exact ques, i cant remember this one

How could you modify the experiment to find out the activity of enzymes at different temperatures?

 

[Idolfanatic95]

How could you modify the experiment to find out the activity of enzymes at different temperatures?

Oh yeah. Keeping all the other variables constant, we cud vary the temperature. Put up like 4-5 test tubes each with the enzyme solution and benedicts reagent and heat them. Calculate the time taken of the appearance of color change and plot a graph against the respective temp

 

[xtremeforums]

Oh yeah. Keeping all the other variables constant, we cud vary the temperature. Put up like 4-5 test tubes each with the enzyme solution and benedicts reagent and heat them. Calculate the time taken of the appearance of color change and plot a graph against the respective temp

hmmm, i wrote that too , mine was a bit more detailed though.