Reproduction in Plants Flashcards
Whats an example of asexual reproduction in plants?
Most involve part of the plant growing and breaking away.
What are the sexual parts of he flower?
The male part of the flower is the stamen which consists of the anther and filament. The stamen is responsible for the production of pollen, the male gamete (Pollen contains 2 male sex cells).
The female part of the flower is called the carpel, which consists of the stigma, style and the ovary. Inside the ovary ovules produce female gametes.
How does fertilization occur in flowers?
Most involve part of the plant growing and breaking away.
To transfer the nucleus to the ovum, the pollen grain forms a pollen tube, which grows down through the tissue of the style and into the ovary.
Here it curves around to enter the ovule. The tip of the tube then dissolves and allows the pollen grain to enter the nucleus to move out of then tube and into the ovule.
Here it fertilizes the ovum nucleus.
How does the seed and fruit form?
The zygote develops into an embryonic plant with small root (radicle) and shoot (plumule).
Other contents of the ovule develop into a food store for the young plant when the seed germinates.
The ovule wall becomes the seed coat or testa.
The ovary wall becomes the fruit coat; this can take many forms depending on the type of fruit.
