reproduction- key terms Flashcards
Define asexual reproduction
the process resulting in the production of genetically identical offspring from one parent.
Define sexual reproduction
a process involving the fusion of the nuclei of two gametes (sex cells) to form a zygote and the production of offspring that are genetically different from each other
Define fertilisation
the fusion of gamete nuclei
Define diploid
Full Set of Chromosomes
Define haploid
Half Set of Chromosomes
Define the function of Sepal
protect the flower bud.
Define the function of Petal
brightly coloured and scented and may have nectarines, which are all used to attract insects. Petals in wind-pollinated flowers are tiny and used for pushing the bracts (leaf-like structures) apart from exposing stamens and stigma.
Define the function of Anther
has pollen sacs with pollen grains that contain the male nucleus (male gamete).
Define the function of Stigma
platform on which pollen grains land
Define the function of Ovary
hollow chamber, ovules grow from the walls.
Define pollination
transfer of pollen grains from the male part of the plant (anther of stamen) to the female part of the plant (stigma).
Define pollen tube
pollen grain lands on the stigma and creates a tunnel down the style, through the micropyle to ovules.
Define self pollination
the transfer of pollen grains from the anther of a flower to the stigma of the same flower or a different flower on the same plant.
Define cross pollination
the transfer of pollen grains from the anther of a flower to the stigma of a flower on a different plant of the same species.
Define germination
A process controlled by enzymes
Define water
activates enzymes to turn insoluble food stores into soluble substances, and makes tissues swell so that the testa splits