Structure of plant reproductive system Flashcards
(19 cards)
carpel - ovule
contains ovum/egg
sepal
protects the bud
pollen grains on IPF
less pollen produced, rough surfaces to cling to insects body
stamen - filament
holds anther in suitable position to dispense pollen grains
carpel - ovary
contains one of more ovules
petal
modified leaf that forms the most obvious part of the flower
collectively make up the corolla
scent on IPF
fragrant/foul-smelling flowers
carpel - style
holds stigma in suiotable position to trap pollen grains
stamen - pollen grains
each pollen grain contains a male gamet (haploid set of chromosomes)
pollen grains on WPF
more pollen, small and light w/ small surfaces to be carried by wind easily
receptacle
protects the ovary
ovum/egg
haploid set of chromosomes
carpel - stigma
recieves pollen grains
a mature stigma secretes sugary fluid to stimulate germination of pollen grains
stamen - anther
produces pollen grains
made up of two lobes each containing two pollen sacs
contains vascular bundle (xylem & phloem)
nectar
present on IPF
absent on WPF
stigma of WPF
large & feathery
hangs outside flower to provide large SA:Vol to recieve pollen
nectar guide
present to guide insects towards nectar
stamen of WPF
long, pendulous filament
holds anther outside flower so pollen grains can easily be carried by wind
