Bio 13.5 Flowers

Question 1

What are the male parts of a flower called? What are the male parts?

Answer 1

Male parts – Stamen

Anther and filament.

Question 2

What is the purpose of the anther and filament?

Answer 2

Anther produces pollen that carries the male sex cell.

Filament holds the anther n a good position for the pollen to spread.

Question 3

What are the female parts of a flower called? What are the female parts?

Answer 3

Female parts – Carpel/Pistil

Ovary and ovules, stigma, and style.

Question 4

What is the purpose of the ovary, stigma, and style?

Answer 4

The ovary has ovules that contain the female sex cell. After fertilization, the ovary becomes the fruit, and the ovules, the seeds of the fruit.

Stigma is sticky so that it catches the pollen.

Style separates the ovary and stigma.

Question 5

What is pollination?

Answer 5

Pollination is the transfer of pollen from the anthers to the stigma.

Question 6

What are the two types of pollination? Explain them.

Answer 6

Self-pollination is when pollen from a flower is transferred to the stigma of the same flower, or to the stigma of another flower in the same plant.

Cross-pollination is when pollen from a flower is transferred to the stigma of another flower’s stigma of another plant, but of the same species.

Question 7

Pollination can happen by insects and wind, but what are the differences between plants pollinated in those ways.

Answer 7

Insect pollinated flowers are large with brightly-colored petals. Wind pollinated flowers are almost inconspicuous.

Insect pollinated flowers may be scented, while wind-pollinated flowers aren’t.

Insect pollinated stigmas are sticky and inside the flower, while wind-pollinated stigmas are feathery and outside the flower.

Insect pollinated flowers have large and sticky pollen, while wind-pollinated ones are very small.

Insect pollinated flowers have nectars in nectaries, while wind-pollinated flowers do not have nectaries or nectar.

Question 8

What is fertilisation?

Answer 8

Fertilization is the process of the fusion of male and female sex cells/gametes.

Question 9

What are the events leading to fertilization?

Answer 9

• Pollen lands on the stigma.
• Pollen sends out pollen tube through style into the ovule.
• The male nucleus from the pollen travels down the pollen tube.
• Male and female nuclei fuse.
• The petals, style, and stigma fall off.
• The ovary develops into the fruit, and ovules the seeds.