As with any green plant, the cactus produces its own food through photosynthesis.
Cactus.
No
cactus and lotus
There are microscopic single cell plants called phytoplankton that live and multiply in water, and mosses, lichens and algae that can live under the snow and ice. No cactus.
cactus and dates were the native plants of deserts
some are the Joshua Tree, cactus some kinds of cactus is, Nopal cactus, Prickly pear cactus, and Black Lace Cactus :)
A saguaro cactus can live up to 250 years.
Cactus plant.
tridax plant, cactus plant and the likes
Yes, a cactus can live in a terrarium. A cactus is a survivor that adapts to a wide range of conditions. What it handles poorly are cold and dampness. So one of the smaller cactus plants should have no problems with a terrarium life style as long as coldness and dampness are controlled.
Cactus, like other plants, uses photosynthesis to get energy.
Yes, people can live without cactus plants if they're outside the plant's native range in North and Latin America. But no, they can't live without cactus plants if they're within the plants' native ranges. Within desert and jungle America, the cactus plays a key role in the environment. For example, the desert cactus is the main vegetative cover that conserves water, disperses sunlight, holds soil together, and provides color and oxygen in an otherwise drab, dry, extreme, harsh environment. The jungle cactus interacts in mutually beneficial ways with the trees on which it's anchored.