PLANTS Flashcards
(16 cards)
What is Pollination?
Transfer of pollen from anther to stigma
What is Fertilisation?
Fusing together of the male and female sex cells to produce a fertilised egg leading to the formation of a seed
What is Germination?
The seed emerges from a period of dormancy and starts to sprout
What is the role of the stigma in fertilisation?
The stigma catches drifting pollen, allowing for the transfer of the male sex cell from the anther to the stigma.
What happens after pollen lands on the stigma?
A pollen tube grows down the style, and the male nucleus moves down the pollen tube to the ovary.
What occurs when the male nucleus reaches the ovary?
The male nucleus fuses with the nucleus in the female egg cell (ovum), forming the seed.
What is wind seed dispersal?
Wind seed dispersal involves seeds that have wings, allowing them to fly away from the parent plant.
Examples include dandelion and sycamore seeds.
How do animals contribute to seed dispersal?
Animals eat fruits containing seeds, which are then excreted after passing through the animal.
An example is plums.
What is explosion seed dispersal?
Explosion seed dispersal occurs when a seed pod twists and releases seeds over a long distance as it dries out.
An example is the lupin.
How does water aid in seed dispersal?
Water seed dispersal involves seeds, like coconuts, that have air trapped in their fibers, allowing them to float.
Coconuts are a prime example.
What is one way leaves are adapted for photosynthesis?
Leaves are broad (wide) to attract light.
What is another way leaves are adapted for photosynthesis?
Leaves are green (contain many chloroplasts) to absorb light.
What is a third way leaves are adapted for photosynthesis?
Leaves are flat to attract light.
What is a fourth way leaves are adapted for photosynthesis?
Leaves have a thin outer layer to allow for light to pass through.
