I got 66% and i have no idea how. Even though its less than 60. I added the amount flowers with 5 stems pr somting than divided it by the total and times it by 100. But i got 66.

Reply 48

ziddy

Original post by Kholmes1

I got 66% and i have no idea how. Even though its less than 60. I added the amount flowers with 5 stems pr somting than divided it by the total and times it by 100. But i got 66.

i wrote 15% who else did

Reply 49

Jacobisswaggy

Original post by wdoctor123

Yap. Wait did you guys do IGCSE? or GCSE

GCSE, not iGCSE.

Reply 50

Janel Rajput

Yeah wrote the same but added that it was very unlikely that they would have different ancestors and still have the same bone structure so they must have all evolved from a common ancestor or they'd have different bone structures

Reply 51

wdoctor123

Original post by Jacobisswaggy

GCSE, not iGCSE.

Oh that makes sense XD I did IGCSE lol

Reply 52

Jacobisswaggy

Original post by Kholmes1

I got 66% and i have no idea how. Even though its less than 60. I added the amount flowers with 5 stems pr somting than divided it by the total and times it by 100. But i got 66.

There were 20, and 3 were over 5 stems per. 3/20 = 0.15 = 15% :smile:

Reply 53

oni176

Red blood cells are 'tissues' right?

And for the aerobic respiration: glucose + oxygen --------- carbon dioxide + water

Lactic acid makes cramps (correct answer statement 2)

Exercise results in an increase in oxygen uptake because the oxygen can be released and the carbon dioxide can be removed faster by the process of diffusion, resulting in an increase in breathing and heart rate

Red blood cells do not contain a nucleus which is an advantage because more room can be used for the haemoglobin to transport oxygen around the body and help diffusion of oxygen to be released and carbon dioxide removed faster.

I hope they are right :smile:

Reply 54

M463

I thought it was MUCH harder than previous exams. The heart question was vile! In the end I got Lungs, D, Deox and Lower pressure I think. Took me about 20 mins to figure it out with mnemonics and stuff. The lighter colour of the blood meant oxygenated which I found so confusing! Wish it was in colour with red/blue I think the two organs at the side were lungs, the one at the top the brain and at the bottom the body so I based everything on that. I thought the 6 markers were easy, but then I didn't make that many points as there wasn't anything else to say. I said Humerus, Ulna, Carpal, Radius, Fingers = common ancestor - all different now, so evolved in different ways, perhaps as adaptation for survival. Then I just talked about enucleation of egg cell, fusion of egg body and nucleus, electrical stimulation to divide by mitosis, embryo implanted into surrogate. Doesn't feel like a full 6 marks but I'm not sure.

For the how much thicker was the ventricle wall one I'm confused. I got that the small wall was 0.3cm and the large one was 0.6cm, therefore I put 0.6/0.3 which is 2. It was 2 marks so even if the correct answer was 3, will I get the marks for the corret method of working out a scale factor? How did people get 3? Gah, how can I not use a ruler?!?!?! xD

Reply 55

Janel Rajput

What did everyone put for the last six marker? My answer is something like this;
The scientists would first enucleate a egg cell and discard the nucleus
They would then enucleate the genetically modified cell, keeping its nucleus
Now they would insert the GM nucleus into the 'empty' egg shell and stimulate it with an electric shock
This would start mitosis and so the cell will divide
Once the cell has become a ball of cells, and the scientists would insert it into a surrogate and a genetically identical clone would be made from the genetically modified cell

Reply 56

oni176

Original post by M463

I think the chamber question was just 1 mark? I'm not sure I used a ruler and got 3 at the end.

Cloning 6 marker - not much you can talk about but the keywords were important. You could have said the nucleus is removed from the diploid adult body cell. The nucleus is also removed from the egg cell (enucleation). Then the diploid adult body cell is inserted inside the enucleated egg cell where it is stimulated with an electric pulse to start mitotic division. An embryo started to grow and implanted to the surrogate mother, which is an example of asexual reproduction producing two identical genes.