Biology - Plant Reproduction Flashcards
(28 cards)
The flower contains the …
Reproductive organs
Name for parts of a flower
Stamens
Carpels
Petals
Sepals
What parts of the flower are the male parts?
The stamen
(Remember it sta-MEN-s)
What does the stamen consist of?
Anther and filament
What does the anther contain?
Pollen grains, which produce the male sex cells.
What does the filament do?
It supports the anther.
What parts of the flower are female?
The carpel
What does the carpel consist of?
Stigma
Style
Ovary
What does the ovary contain?
It contains the female sex cells inside ovules.
Pollination is …
Getting pollen into the stigma.
To make a seed (which will eventually grow into a new plant), the male and female sex cells must …
“Meet up” or join
How must the male and female sex cells “meet up”?
The pollen grains must get from a stamen to a stigma.
What are the two ways pollen can get from the stamen to tge stigma.
Self pollination and cross pollination
Self pollination is when …
Pollen is transferred from the stamen to the stigma on the SAME PLANT.
Cross pollination is when …
Pollen is transferred from the stamen of one plant to the stigma of a DIFFERENT PLANT.
Cross pollination can involve…
Insect pollination and wind pollination
Plant features that help insect pollination:
Brightly coloured petals.
Scented flowers with nectaries (glands that produce a sugary liquid for insects to feed on)
Sticky stigma to take the pollen off the insect as it goes from plant to plant to feed in the nectaries.
Features of plants that use wind pollination
Usually, small dull petals on the flower.
No scent or nectaries.
Long filaments hang the anthers outside the flower, so a lot of pollen is blown away.
Stigmas are feathery to catch pollen as it’s carried past in the wind.
Fertilisation is the …
Joining of sex cells
Pollen is the plant equivalent of …
Human sperm
Pollen grains land on a ??? with help from insects or the wind.
Ripe stigma
A pollen tube then grows out of a pollen grain, down through to the ??? to the ???.
Style to the ovary
The nucleus from a male sex cell moves down the tube to join with a female sex cell inside an …
Ovule
