Reproduction In Plants

Question 1

Function of sepals

Answer 1

Enclose and protect the other parts of the flower in the bud stage.

Question 2

Function of petal

Answer 2

1. They are vibrant to attract insects for pollination

2. Provide a platform for insects to land

Question 3

Function of anther

Answer 3

1. Produce pollen grains

Question 4

Function of stigma

Answer 4

1. It receives pollen grains—>mature stigma secretes a sugary fluid that stimulates the pollen grain to germinate

Question 5

Function to style

Answer 5

1. Connects the stigma to the ovary

2. Hold stigma in a suitable position to trap pollen grains.

Question 6

Function of ovary

Answer 6

1. Develops into a fruit after fertilisation

2. Produces and protects one or more ovules

Question 7

Function of ovule

Answer 7

1. Develops into a seed after fertilisation

2. Produces a female gamete(ovum) by meiosis.

Question 8

Definition of pollination

Answer 8

The transfer of pollen grains from the anther to the stigma

Question 9

Definition of self-pollination

Answer 9

The transfer of pollen grains from the anther to the stigma of the same flower or of a different flower on the same plant.

Question 10

Definition of cross-pollination

Answer 10

The transfer of pollen grains from one plant to the stigma of a flower on another plant of the same species.

Question 11

Process of fertilisation

Answer 11

1. After pollination, pollen grain germinates in response to the sugary fluid secreted by the mature stigma.
2. A pollen tube grows out from the pollen grain(controlled by the pollen tube nucleus)
3. The cytoplasm and the 2 nuclei pass into the pollen tube.
4. The pollen tube secretes enzymes to digest the surrounding tissues of stigma and style.
5. Pollen tube enters the ovule through the micropyle .
6. The generative nucleus divides into 2 male gametes while the pollen tumble nucleus disintegrates.
7. When the pollen tube reaches the ovule, its tip a