1.-Main characteristics

The cactus was thirty million years ago.
They were born in the United States.
You may find them in different places, they can be adapted to any climate.
They hold a lot of water inside.
They have many thorns.
They defend these thorns if an animal wants to eat them.
The birds brought the seeds in his stomach.
The stem is the main structure .

2.-Parts of my plant

Areola+Thorn
Armpit
Neck
Roots
Tuber
Crown
Vascular tissue

3.- Reproduction

They reproduce by seeds or cuttings.
They are hermaphroditic plants.
Insects play a major role in pollinating flowers carrying pollen from one to another .

4.-Pollination 

The cactus can be pollinated themselves or by others of their own species .

5.- Fun fact !

They have discovered more than two thousand five hundred different species.
They have thorns instead of leaves .
Petals often have spiral form.
They dry and sweet fruits.