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3.4 Fertilisation & the formation of seed & fruit, fertilised…
3.4 Fertilisation & the formation of seed & fruit
pollination
nucleus from the pollen grain travels down a pollen tube to combine with nucleus of ovum
explain process (textbook)
male nucleus + female nucleus ---> zygote --->embryo
fertilisation complete
seeds sends hormone message to the flower
sepals and petals : wither away & fall off
stamens, stigma & style : wither away
the formation of seed & fruit
ovary : dry and hard/ very soft & fleshy / leathery pouch
fertilised ovule --> seed
fertilised ovule
cotyledons (seed leaves) : food store for embryo
one (monocotyledon): grasses
two (dicotyledons): peas & beans
seed coat (testa) : prevents drying out of the embryo
plumule : young shoot
radicle : young root
micropyle: hole in testa that allow the entry water and oxygen as the germinate