Chapter 20: Reproduction in Plants

Tince food

________ is usually present in the vegetative structures,

gametesNatural vegetation

There is no fusion of two reproductive cells called ________.

germination

Hypogeal ________ where the cotyledons remain below the surface of the soil.

pollen

The ________ moves down the ________ tube to the ovule.

Define asexual reproduction.

It is the "production of new individuals" that does "not involve fertilization", i.e no fusion of two gametes.

What is natural vegetation?

It is a form of "asexual reproduction", involving the "growth of a new daughter plant" from any part of an old plant.

Mention a few advantages of natural vegetation.

Advantages of natural vegetation are:

Mention a few disadvantages of natural vegetation.

Define sexual reproduction.

It is the "fusion" of special cells called "gametes".

What is the role sepal in a flower?

It is the "modified leaves" which enclose and "protect the other parts of the flower" in the bud stage.

What is the role of petal in a flower?

They are the modified parts of the flower, They have two important roles; they are brightly coloured to "attract insects for pollination" and they provide a "landing platform for insects".

What is the role of stamen in a flower?

It is the male part of the flower, its man role is to "produce pollen grains".

What is the role of carpel in a flower?

It consists "ovary".

What is meant by pollination?

It is the "transfer of pollen grains" from the "anther to the stigma".

How are flowers pollinated by insects?

How are flowers pollinated by wind?

How does fertilization occur in flowers?

What are the features of wind dispersed seeds?

What are the features of animals dispersed seeds?

What are the features of water dispersed seeds?

Define germination.

It is the process during which the "food reserves present in a seed are broken down" and the "embryo starts to grow into a plant".