In most species the stem has evolved to be photosynthetic and succulent,while the leaves have evolved into spines,this helps it adapt to hot and dry environments.
Leaves have evolved into spines on the cactus.
By evolution
no,there would be little change because the cactus wont be able to adapt to the environment.
In a desert, they adapt so that they are able to hold in and store more water. For example, there is a cactus.
A cactus
Because all cactus have large sacks in them like camels that hold water. >:{D
A cactus that has flowers is giving the flowers fluids from within. A cactus is like a camel except with many more chambers. The cactus stores moisture for long periods of time.
They have Spikes to stop predators trying to eat them
A cactus adapts to its environment by losing its spines to reduce water loss and protect itself from animals.
it may or may not depending on speices.
Because all different animals and plants have their own different , special feature which helps them survive in the mountains.
flower+sand=cactus hope this helps