Reproduction in plants Flashcards
Function of stamen
Male reproductive organ of plant
Function of carpel
Female reproductive organs of plant
Function of filament
Elevates anther exposing it to wind and pollinators
Function of anther
Contains and releases pollen (make gamete)
Function of ovary
Produces ovules (female gamete)
Function of style
Elevates stigma exposing to wind and pollinaters
Function of stigma
Catches pollen from wind and pollinators
Function of sepal
Thick protective leaves n outside of bud, peel back after flower blooms
Function of receptacle
Connects stem to flower
Define pollination
The transfer of pollen from the anther to the stigma
Define cross pollintation
Transfer of pollen from anther to the stigma of a flower on another plant of the same species
Define self pollination
Transfer of pollen from the anther to the stigma of the same flower or another flower on the same plant
Petals in wind vs insect pollinated flowers
Wind= Drab, uncoloured or green
Insect= Bright and colourful
Odours in wind vs insect pollinated flowers
Wind= No scent
Insect= To attract pollinators
Pollen adaptation in wind vs insect pollinated flowers
Wind= Dry and light- adapted to be carried over large distances, in large quantities
Insect= Sticky/patterened
2 Implications of asexual reproduction
1) Less variation of genes
2) Single plant can reproduce
Define stem cells
Unspecialised cells that divide by mitosis that becomes specialised
Explain what FSH does
1) Stimulates egg maturation in the follicles of the ovary
2) Stimulates the follicles in the ovaries to release oestrogen
Germination means
A seed spouting
Germination requires 3 factors
1) Suitable temperature (right season)
2) Oxygen (Needed for respiration to produce energy for cell division
3) Water (soften seed)
How a protein is made [3]
1) DNA always remains in the nucleus
2) DNA is copied to form mRNA (Messenger RNA) in the nucleus
3) Ribosomes convert the genetic sequences into a chain of amino acids which folds to form a protein
