UNIT 2: (2.3) Reproduction Flashcards
what is fertilisation?
the fusion of the nuclei of two haploid gametes (n) to produce a diploid zygote (2n) which then repeatedly divides by mitosis to form an embryo
what are all the structures in a plant? (8)
- anther
- stigma
- style
- ovary
- ovule
- nectary
- petal
- sepal
what is the function of the anther?
male part that produces pollen grains (male gamete)
what is the function of the stigma?
where pollen grains land in pollenation
what is the function of the style?
female part connecting stigma to the ovary
what is the function of the ovary in plants?
female part that produces and stores ovules( female gamete)
what is the function of the ovule?
contains the female gamete
what is the function of the nectary?
makes nectar to attract insects
what is the function of the petal?
brightly coloured to attract insects
what is the function of the sepal?
protects the bud before flowering
what is pollination?
process by which pollen grains are transferred from the anther to the stigma
how does fertilisation happen in plants?
- pollen grain lands on stigma a pollen tube grows down to the ovary
- male gamete leaves the pollen grain and travels down the pollen tube into the ovary
- the fuses with the nucleus of the female gamete (ovule) in fertilisation
what structural features of an egg cell allow it to perform its function?
- has a store of food in cytoplasm
- larger than sperm for nucleus
what are all the structures of the male reproductive system?
- testis
- sperm tube
- penis
- urethra
what is the function of the testis?
where sperm cells are produced
