Question

describe the fertilization in flowering plants

Answer 1

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Describe the process of fertilization in flowering plants. Discuss 2 mechanisms of pollen transfer and the adaptations that facilitate each.This is an AP biology question and I need it today...

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GIORGIANA1976 | STUDENT

Fertilization of plants with flowers is unique because, unlike all other organisms, in their case is realized  simultaneous fertilization of two cells by a process called double fertilization. The only exception is the plants included in the genus Ephedra in which case the second fertilization and their development stops and  degenerates.At angiospermous, fecundation takes place after wind, water or insects pollination. The grain of pollen, reached on stigma, germinates  forming a police tube. Through this tube enters the two male gametes, coming from mitotic division of the kernel which generated  pollen grain. 

Answer 2

When a pollen grain falls on a stigma of flower it starts developing a thin pollen tube through style to the ovule int the ovary. the male gamete moves down through the pollen tube fuses with the female gamete present in the ovule to form the fertilised egg called zygote.