13.5b Flowers (Pollination & Fertilisation)

Question 1

What are the 5 steps of reproduction in a flower?

Answer 1

1. Pollination
2. Fertilisation
3. Seed & Fruit Development
4. Dispersal
5. Seed Germination

Question 2

Describe the process of pollination

Answer 2

The transfer of pollen from the Anther to the Stigma

Question 3

What are the 2 types of pollination?

Answer 3

Cross-pollination & self-pollination

Question 4

What is the difference between cross-pollination & self-pollination?

Answer 4

Self-pollination is when the pollen from an anther of one flower is transferred to the stigma of the same plant. Cross-pollination is when the pollen from the Anther of one flower is transferred to the stigma of another flower of the same species

Question 5

What are the 2 types of flowers?

Answer 5

Insect-pollinated and Wind-pollinated

Question 6

Give 3 features of an insect-pollinated flower

Answer 6

Possible answers:
- Brightly colored petals
- Usually produces nectar and scent
- Stamen and stigma are inside the ring of
petals
- Anther not articulated
- Fewer pollen grains
- Pollen grains are large and spiky
- Stigma is short and inside the flower

Question 7

Give 3 features of a wind-pollinated flower

Answer 7

Possible answers:
- Small dull petals
- No nectar or scent
- Stamen and stigma hang out ring of
petals
- Anther is articulated
- Large number of pollen grains
- Pollen grains are small, smooth and
aerodynamic
- Stigma is feathery and branched

Question 8

Describe the process of fertilisation

Answer 8

The pollen grain uses sugar found on the stigma for energy to grow a pollen tube and digests its way down the style and to an ovule in the ovary. the male and female nucleus fuse together, forming a zygote

Question 9

What happens after fertilisation?

Answer 9

The ovule develops into a seed, and the ovary develops into a fruit