17th May 2016- OCR 21st Century Science B1 B2 B3 Exam

That would be great I hope that's true where did you hear that?


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After finishing the test I can fairly say it was very easy and don't want to get ahead of myself by being too cocky. I'll just go through what I wrote for all three six markers
1-TWINS-
They can all look different due to environmental factors such as health and fitness one may have heart problems ext also they are clones of each other having the same genotype but the apperence changes due to environmental reasons contrary to what I said earlier. However is it fair to test on them because their twins you should at least get their concent. Also there may be horrific side effects leading to effects in their life. Furthermore there is a very small chance one could die due to experiments alough the chance is very minimal.
2-EBOLA-
It can be good as the dead cells go inside the immune system and the antibodies fight them also the memory cell remember the antibodies (white blood cells ext) to fight that disease leading to an immunity this same effect is used in vaccines such as Edward jenners smallpox. however they may not have the same blood type leading to damages to her body as the blood will reject his. Furthermore in 3rd world countries they have a lack of protein and a non nougritionla diet leading to a ineffective immune system due to the lack of protein this means the dead cells may cause harm and the vaccine might not work.
3-EXTINCTION-(I wrote so many bulletin points)
Their habitat could have been destroyed. Change in food chain. Other species could of been extinct. Too much competition. Natural disasters. Change in environment. Other species mutate. Disease. Infection .lack of protein and no vaccines to infections/diseases. Ext

Anyone got simular

even though this test was quite hard we should still happy that we didn't do the aqa exam.

True, at least ours had biology in it rather than business studies

Apparently for the Extinction 6-marker you had to talk about natural selection (according to most of my mates) . But I don't see the link. What do you think of this?

I don't see how there any correlation between extinction and natural selection as the majority in the chat and myself have spoke about how they could of become extinct ext not natural selection

Apparently for the Extinction 6-marker you had to talk about natural selection (according to most of my mates) . But I don't see the link. What do you think of this?

It is being talked about on Twitter and this is normally a good sign at people struggled so the grade boundaries should be low


Posted from TSR Mobile

Nah, surely not??? It specifically asked about causes of extinction, not survival. Seems like most people didn't talk about NS and they've not asked about extinction as much in the past - so it makes more sense to ask about it in 2016

My teacher said fractional distillation or modifications for C1, something with salt or chlorine for C2 and combustion or transport pollution for C3. But after today I wouldn't say you can predict anything

That's a very fair point. But people have said that natural selection leads to some people becoming more advantageous than others, and so the others will die because they cannot adapt....

Anyways, thanks for clarifying too!

Actually I was thinking that too. Although NS can lead to survival it can also go the reverse and the species with less advantageous genes can't compete and die - just as you said. But tbh our points are definitely correct about extinction so I think the mark scheme should be relatively flexible. It better be fair!!!

Yeah, it's not like they would mark us down for not mentioning Natural Selection. We can obviously still get a Level 3 (5-6marks) answer for the points we've mentioned.

why?

Could someone make a c1c2c3 thread, to focus on the chemistry exam

We can share predictions/resources to help get the a*s we want

Is it just me or did the test feel a lot shorter then the practise ones? I mean it felt like so much less paper. And for the Neanderthal question I said as one point that it evolved into a different species, does that count would you say? The 6ers were so weird, and nothing on the nitrogen cycle.