yes
No, cacti are only natives of the Americas. They do not occur naturally in Madagascar.
No, cacti are strictly plants of the Americas. If they are found elsewhere they are not natural and would be considered an invasive species.
Yes, many cacti genera are found in the desert.
No, cacti can also be found in grasslands, scrub and even in rain forests.
Madagascar
In Madagascar
Yes, there are cacti in the deserts of California.
where was cacti first found
No, cacti are natives to the Americas only and not found naturally in Asia.
In Madagascar!
Across the world preferably in dry deserts.
Yes, some of the largest and most spectacular cacti in the world are found in the Sonoran Desert, including the saguaro and cardon cacti.