CIE IGCSE Biology Alternative to Practical

Original post by examhater44

For the safety one, I put wear safety googles and gloves

I put wear gloves too

Original post by 123Master321

This has appeared in previous mark schemes, gas syringe is fine

Gas syringe is the correct answer

Reply 85

Original post by XCharlotteDoyleX

Yes i know, but seeing as the picture was full of cells I didn't exactly know where to start :frown:

I drew the outline, then the multiple layers, I drew the ONE xylem vessel as asked as you have to read the full question it says only draw that. I draw the multiple regions, I think it was worth like 5 marks?

Reply 86

suht

2

For the control of the potato experiment will I get the marks for saying don't use ethanol on one test to show that ethanol has an effect on rate of reaction

Reply 87

SalopJack

2

This is what i drew. how many marks is this worth?

Reply 88

123Master321

Original post by CIEBioloysifh

I drew the outline, then the multiple layers, I drew the ONE xylem vessel as asked as you have to read the full question it says only draw that. I draw the multiple regions, I think it was worth like 5 marks?

It never said draw one xylem vessel, only identify the xylem and phloem, xylem are cells so I think you had to not put the xylem in it

Reply 89

DhillonDodhia

6

Original post by XCharlotteDoyleX

So if i drew the diagram exactly how it looked on the paper will i get any marks at all? :frown:

u may get marks for size but otherwise i think not.

Reply 90

Zx12r1

Original post by DhillonDodhia

u may get marks for size but otherwise i think not.

Wouldn't yo uget marks for the shape as well as label

Reply 91

Zak990

Im actually so worried i lost small marks...
there was one question for the control experiment and i said boil the potato and repeat the rest. I forgot to say that it would denature the enzymes aswell aha i did so ****.

Reply 92

Original post by 123Master321

It never said draw one xylem vessel, only identify the xylem and phloem, xylem are cells so I think you had to not put the xylem in it

How could you label it if you didn't draw it?

Reply 93

Original post by SalopJack

This is what i drew. how many marks is this worth?

Maybe 2 or 3?

Reply 94

123Master321

Original post by CIEBioloysifh

How could you label it if you didn't draw it?

Label the section

Reply 95

Zx12r1

Wait so if you literally drew what the image was on the paper and labelled xylem vessel how many marks would you get

Reply 96

Original post by 123Master321

Label the section

It wouldn't mean just label an empty section, you probably needed to drawn the outline of the xylem vessel as it said identify on your diagram I think.

Reply 97

Zak990

14.5 or 15 for the mean value in the table. Some of my mates rounded up or down and some left it the same.

Reply 98