Reproduction in Plants Flashcards
Position of stamens in insect-pollinated flowers
Enclosed within flower so that insects must make contact
Position of stamen in wind-pollinated flowers
Exposed so wind can easily blow pollen away
Position of stigma in insect-pollinated flowers
Enclosed within the flower so that insects must make contact
Position of stigma in wind-pollinated flowers
Exposed to catch pollen blowing in the wind
Type of stigma in insect-pollinated flowers
Sticky so pollen grains attach from insects
Type of stigma in wind-pollinated flowers
Feathery to catch pollen grains blowing in the wind
Size of petals in insect-pollinated flowers
Large to attract insects
Size of petals in wind-pollinated flowers
Small
Colour of petals in insect-pollinated flowers
Brightly coloured to attract insects
Colour of petals in wind-pollinated flowers
Not brightly coloured, usually green
Nectarines in insect-pollinated flowers
Present - They produce nectar, a sweet lipid containing sugars as a “reward” for insects
Nectarines in wind-pollinated flowers
Absent
Pollen grains in insect-pollinated flowers
Larger, sticky grains or grains with hooks to stick to insects’ bodies
Pollen grains in wind-pollinated flowers
Smaller, smooth, inflated grains to carry in the wind
The growth of the pollen tube and fertilisation results in seed and fruit formation with what changes?
- The zygote develops into an embryonic plant with a small root (radical) and shoot (plumule)
- Other contents of the ovule develop into a food store for the young plant when it germinates
- The ovule wall becomes the seed coat or testa
- The ovary wall become the fruit coat (this can take many forms depending upon the fruit)