Saturday, 23 February 2013
3.4 understand that the growth of the pollen tube followed by fertilisation leads to seed and fruit formation
A pollen will travel down the stigma through a pollen tube, in to the ovule in the carpel. Here the pollen will fertilise the ovule, forming a zygote (the seed). The carpel (reproductive organ) becomes a fruit.
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how does the pollen tub form? is it enzymes
ReplyDeleteP.S thanks for this blog
I'm afraid I don't actually know the answer, I expect it has something to do with hormones, enzymes and proteins... you don't need to know it for GCSE but I will try and find out anyway :)
DeleteMy tutor told me that it was digestive enzymes if that helps?
ReplyDeletethe pollen grain tube grows down through the style. Enzymes that digest the style, travel down the style to the ovule
ReplyDeleteyum
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ReplyDeletemore at
ReplyDeletehttp://igcse-biology-notes.blogspot.hk/2017/06/34-understand-that-growth-of-pollen.html