Some of them do and some varities don't. Here is web site I have found that's very interesting. The Barrel Cactus is used for candy, drinking and many other things. http://www.desertusa.com/mag99/june/papr/barrelcactus.html
b'coz they need less water to survive
The Simpson desert contains many types of vegetation including the Barrel Cactus, Organ Pipe Cactus. Saguaro Cactus, Prickly Pear Cactus.
The fishhook barrel cactus is found in both the Chihuahuan Desert and the Sonoran Desert.
Water, or the lack of water, has the greatest effect on cacti.
The desert lark eats seeds and insects and metabolizes food at a slower rate than other birds in other climates. The desert lark has adapted to living in the desert and can survive on minimal water as well.
A cactus competes with other plants for water.
You can find water in cactus.
The barrel cactus can be a plant that animals can get water from in the desert.
yes there is, you can get the water from the cactus.
a cactus holds water the most
Cactus
Some get the hydration from their prey, and some get it from the water in the desert cactus.
temperature, water and elevation
cactus
cactus has water for animals and it is a home for most desert creatures
Sometimes under the ground depending on the animal or desert.
A desert cactus is a type of plant that is adapted to survive in arid environments. They typically have thick stems to store water, spines to reduce water loss from transpiration, and shallow roots to quickly absorb water when it rains. Many desert cacti also bloom colorful flowers to attract pollinators in their harsh habitat.