HOW DO SEED PLANTS GROW & REPRODUCE?

WHAT CAN YOU SEE IN THIS PICTURE?

These are seeds

WHAT ARE

SEEDS?

Plants are just like us, they have babies & make new plants

-So, A seed is a baby plant

SEEDS

They are plants that are not fully formed

PARTS OF A SEED -A seed has 3 parts:

1 )Seed coat : A cover that protects the seed.

2 )Embryo: The baby plant.3 )Stored food.

Seed coat

Stored food

Embryo

WE CAN CLASSIFY THE SEEDS ACCORDING TO

Seed structure Where are seeds stored

-Water melons have flat small seeds.

-Mangos and peaches have one seed .

-Coconuts are giant seeds.

-Flowers that bear “make” seeds like: Apple trees

-Seeds found on the surface of the cones like: Pine trees..

A PINE TREE

A pine tree contains two types of cones:1) A Male cone.

2) A Female cone.

REPRODUCTION IN PINE TREES

Male cone Female cone

-Small cones.

-Present below the female cones on a conifer tree.

-Produce pollens “Yellow powder”

-Bigger cones.

-Present above the male cone in a conifer tree.

-Produce “make” the seeds when the pollens are carried by the wind and land on the female cone

THE FLOWER

-Most of the flowers have 2 parts:1) Male part Anther (Stamen) Filament

2) Female part Stigma (Pistil) Style Ovary Ovule

-The flower is the part of the plant which is responsible for reproduction .

THE FLOWER STRUCTURE

Stigma

Style AntherPollen tube

Filament

Ovule

PetalOvarySepal

POLLINATION - Now let’s see what happens inside a

flower

Pollination: it is the transfer of the pollens from the male part to the female part of the flower.

STEPS OF THE POLLINATION

1 )The petals have bright colors to attract insects to drink the nectar (sugary liquid) in the flowers.

2 )Pollen grains from the anther stick to the insects wings and gets carried to the stigma (Pollination)

3 )Tube “Pollen tube” grows down the style and enters the ovary