plant co-ordination Flashcards
auxin model answer
plant hormone which diffuses down from the stem
when light strikes one side more auxin is built up on the other side
auxin causes cells to elongate
causes the shoot to bend over towards the light.
auxin model answer
plant hormone which diffuses down from the stem
when light strikes one side more auxin is built up on the other side
auxin causes cells to elongate
causes the shoot to bend over towards the light.
4 ways asexual reproduction occurs in plants
runners
tubers
bulbs
cuttings
sexual reproduction adaptations of plant
inside flower to make sure of contact
large stick grains with hooks on them for hooking onto fur.
what does the sepal do
protects the flower when it is a bud
what do the nectaries do
give out sugary liquids to attract insects
what do the nectaries do
give out sugary liquids to attract insects
wind pollinated flowers adaptations
pollen grains are small and smooth entailing that they are therefore easy to carry in the wind
the stigma is outside meaning that it is exposed to the wind.
no scent
seed formation
zygote develops into an embryonic plant with a radical and a plumule
rest of the plants develop into a cotyledon
ovule wall becomes the seed coat
ovary becomes fruit.
fertilisation model answer
a ripe pollen grain lands on the stigma
pollen tube grows a long thin pollen tube which digests its way through the style into the ovary
pollen grain nucleus moves to the tip of the pollen tube
pollen tube grows around to the opening in the ovule
pollen grain nucleus moves into the ovule and fuses with the egg cell and nucleus.
during germination what do enzymes do
starch is converted to glucose by amylase
asexual reporduction
cuttings are taken stored and grown from a plant and a clone will be created
or runners, where plant grow out strong stems
