Plant reproduction Flashcards
Function of petals/ nectarines
attracts insects for pollination
function of stamen
male reproductive parts (anther, Filament)
function of anther
(top bit of stamen) produces pollengrains
function of filament
supports the anther
function of carpel
Female reproductive part- contains Ovary
function of stigma
female part of the plant where pollen lands
function of style
supports the stigma and is the tube which links male and female gametes
ovule
contains female gametes
function of pollen
produced by anther- each matured pollen grain contains a tube cell consisting of a tube nucleus and male gamete
definition of pollination
pollen grains are transferred from the stamen to the stigma
difference between wind and insect pollinated plants
insect- petals are coloured to attract plants
flowers are scented and sweet
nectaries are to attract insects
difference between wind and insect pollinated plants
wind- pollen is light and smooth so it travels easily and does not clump together
- pollen produced in great quantities
- anthers loosely attached and dangle out
what is pollination?
the movement of pollen grains from the anther of one flower to the stigma of another
advantage of cross pollination?
genetic diversity which keeps it resistant to disease
why is it important that seeds are widely dispersed?
decreases competition
describe a way seeds can be dispersed:
1- wind dandelions get parachuted to a new destination as they have fluff heads which allows them to fly away
describe a way seeds can be dispersed:
2- animal burdock seeds have hook which can easily latch on to for example dog’s fur which will then distribute them to a new destination
describe a way seeds can be dispersed:
3- explosion pea shoots and poppy seeds explode and fly out, allowing
describe what happens after the pollen grain lands on the stigma
a pollen tube grows from the stigma down into the style into the ovary where it enters the micropyle. the ovule produces a. seed and the ovary becomes a fruit.
