iGCSE biology edexcel May 17th predictions

Could you help me out with this question??
Describe the events that follow pollination and how they lead to seed formation.

Lets just use pests resistance to pesticides

All living creatures have variation - i.e. they are not all the same
There is a Selection Pressure of the pesticide, and at random a mutation occurs in a pest which makes it resistant, they have a selective advantage, and won't be killed by the pesticide, therefore the non-resistant pests are at a selective disadvantage. These non-resistant pests die because of the pesticides, whereas the resistant pest can reproduce and produce many offspring which are resistant and then reproduce more. Therefore the population of the non-resistant decrease and the resistant increases. This is bad for humans because we can't use the pesticide. So for a while we stop using the pesticide, then the non resistant population increases. then we kill them again.
In other areas, lets say a group of rabbits with short ears, which can't hear things well, are released into woods their selection pressure is not being able to hear their predators and get killed by them. some rabbits reproduce and a gene mutates so that the offspring have large ears, they can hear the predators when they are further away, so when the predators approach they run, but the other rabbits in other areas don't know this and get killed (please don't try to picture this, I am and it is very disturbing), therefore, you are left with mainly long-eared rabbits in that area. Then compare this to if we released the same type of rabbits into a field with no danger of predators, there will be no need to have big ears because nothing is hunting them.

As Darwin concluded 'Survival of the fittest'
and to fill your childish needs: What does Mufasa talk about - 'The Circle of life'

If anyone can add, feel free to

Thank youuuu so much :d

What's everyone's weakest topic, maybe if someone finds someone else's weakest a stronger topic they can go through and try to explain?
Cause you know... Revision while procrastinating


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Hello! Can you tell me what are the things we are supposed to know about the structure of the urinary system, the nephrons and about ultrafiltration? I'm having a feeling that this is gonna come up. Btw can menstrual cycle come?

I dunno, but they might ask how the eye changes when viewing a dimly/ brightly lit distant/near object XD it's very typical of them to ask.

Oh my gosh I though that too!! I also think reproduction in plants will come up. Almost certain

The seed formation question came up on this year's January paper so I'm not entirely sure whether there'll be a question on this.

Do you gys mind sharing your bio and chem notes as i have been in hospital for 3 weeks

I'm absolutely shitting myself for this exam, do you think it will be an easy or hard paper, June 2015 paper last year was piss easy, I hope they have something similar to it