Sexual reproduction in plants Flashcards
(12 cards)
Label the flower?
Define pollination?
transfer of pollen from an anther to a stigma, so that the male gametes can fertilise the female gametes in sexual reproduction.
define cross pollination?
a type of sexual reproduction where pollen is transferred from the anther of one plant to the stigma of another
plants that cross-pollinate rely on?
insects or the wind to help them pollinate
Describe how fertilization involves a male and female gamete to produce a zygote that undergoes cell division and develops into an embryo.
How are flowers adapted for insect pollination?
bright petals to attract insects
scented flowers and nectar to attract insects
they make big sticky pollen grains (stick to insects)
stigma is sticky, so any pollen picked up will stick to the stigma
how are plants adapted for wind pollination?
no bright petals or nectar
lots of small and light pollen grains so they can easily be carried by the wind
large and feathery stigma to catch pollen as it’s carried past by the wind. the stigma often hangs outside the flower too.
describe practical investigating conditions needed for seed germination?
Describe how plants can naturally asexually reproduce?
describe how plants can actually asexually produce?
name 3 differences of Sexual and Asexual reproduction?
- Number of Parents
- Asexual: Only one parent is needed
- Sexual: Requires two parents
2. Genetic Variation - Asexual: Offspring are genetically identical to the parent (clones)
- Sexual: Offspring show genetic variation
3. Gametes Involved - Asexual: No gametes (sperm or egg) are involved
- Sexual: Involves the fusion of male and female gametes
describe how Germinating seeds utilize food reserves until the seedling can carry out Photosynthesis.
