reproduction in flowering plants

movement respiration sensitivity growth reproduction excretion nutrition control

only one cell is required cells in one part of the body decide my mitosis (cell division) and then break off from the parent to form a new organism all offspring’s are genetically identical

two gametes (sex cells) needed 2 cells involved (male and female) each gamete has half set of chromosomes (23) the offspring is not genetically identical

male gamete move to the female gamete and fuse together

zygote

transfer of pollen from the male anther of a plant to the female stigma of a plant

self pollination cross pollination

wind animals (birds/bees)

they are different in structure because they do not have to attract insects but do need to be exposed to the wind

they are adapted to attracts insects to them to enable transfer of pollen

pollen grains are very small, smooth and light to carry in wind lots of them (large numbers)

large, sticky grains with barbs for hooking onto insect fur

stamens are outside so that they are exposed to the wind so that pollen can be blown away

stamens inside so insect has to make contact positioned to run pollen onto insects

stigma outside so exposed to the wind stigma are feathery to catch pollen carried by wind

inside the flower to make sure of contact + sticky to collect the pollen

no scent or nectar as no need to attract insects

nectar and scent present as a reward

petals are small and green as there is no need to attract insects

large petals, brightly coloured to attract insects