P5 Reproduction in Plants (Concept Map)
Primary 5 Science — Concept Map
Created by Miss Clarissa Ng · www.clartutors.com
Reproduction in Plants
sexual reproduction — offspring genetically different from parents; the flower is the reproductive part
parts of a flower
Male partsanther (makes pollen) + filament
Female partsstigma, style, ovary, ovule
pollination
Selfsame flower / same plant
Crossdifferent plants, same species
What pollination ispollen grains are moved from the anther to the stigma
Why reproduce?Offspring are genetically different from their parents
by which agent?
Animalbright petals, scent, nectar, sticky pollen
Winddull & small, no nectar, feathery stigma, light pollen
Hidden anthersanthers and stigmas stay inside, so animals must enter
Anthers hang outwind-blown anthers hang out of the flower
fertilisation
pollen tube grows down the style → male cell fuses with female cell in the ovule
Pollination comes firstPollination happens first; fertilisation comes only after it.
development
Ovary → fruit
Ovule → seed
rest wither & drop off
seed dispersal
Watercoconut, mangrove
Winddandelion, maple
Splittingbalsam, pea plant
Animalsmango, burdock
Why disperse?Avoid overcrowding and reduce competition between plants
Floating fruitsFibrous husk traps air so the fruit floats
Hitching a rideHooks catch on fur or feathers of passing animals
more examples
More by waterPong pong, lotus and nipah palm float away on water too.
More by windmaple, shorea and angsana have winged seeds
More by animalspapaya, apple and berries are eaten and passed out