angiosperm reproduction Flashcards
what is the dominant stage in the life cycle of an angiosperm?
mature flower found on sporophyte
where are the female reproductive structures and what do they consist of?
structures are in the carpel consisting of stigma, style, and ovary
what does the ovule contain?
the ovule contains diploid megasporangium that give rise to an egg
does the megasporangium undergo mitosis or meiosis?
meiosis to give rise to 4 haploid cells, but only one lives as megaspores
what does the surviving megaspores turn into?
egg
what surrounds the egg?
synergids: pollination/fertilization
antipodal cells: fertilization/seed development
what are the male reproductive structures?
stamens which consist of filament and anther
does a microsporangium undergo mitosis or meiosis?
meiosis to produce haploid microspores
how do microspores divide?
by mitosis to form to give a generative cell and a tube cell
where does the pollen grain land?
it lands on the stigma, and the tube nucleus produces a pollen tube
what happens after the pollen tube is produced?
2 sperm nuclei go to ovary into micropyle and fertilize the egg
what happens to the sperm that doesn’t fertilize the egg?
it combines with the 2 polar nuclei to form a diploid zygote and a triploid endosperm
what happens after the zygote is formed?
zygote divides and gives rise to plant embryo
