Topic 2.4.6 - Fertilisation in Plants

Question 1

What is the name for the male reproductive parts of a flower?

Answer 1

Stamen

Question 2

What is the name for the female reproductive parts of a flower?

Answer 2

Carpels

Question 3

What parts of the flower make up the stamen?

Answer 3

Anther
Filament

Question 4

What parts of the flower make up the Carpel?

Answer 4

Ovary
Stigma
Style

Question 5

What is self pollination and what does it result in?

Answer 5

Pollen lands on the stigma from the same plant.
Less robust plant

Question 6

What is cross pollination and what does it result in?

Answer 6

Pollen from anthers lands on stigma of a different plant that is from the same species.
More robust plant.

Question 7

What happens when a pollen grain lands on the stigma?

Answer 7

Pollen grain grows a pollen tubule which grows down the style.

Question 8

Where does the pollen tube grow to and what happens next?

Answer 8

Grows to the ovary
Delivers pollen nucleus to ovule

Question 9

What happens to the generative nucleus?

Answer 9

Divides by mitosis to form 2 male sperm nuclei

Question 10

What happens when pollen tube reaches the ovary?

Answer 10

Tube nucleus degenerates
2 sperm nuclei enter
1 fertilises with egg nucleus to form a diploid zygote.
Other fuses with 2 polar nuclei to form a triploid endosperm.

Question 11

What is the micropyle?

Answer 11

Entrance to the ovule