The spines of the cactus are actually their leaves. They are so sharp and prickly to reduce the amount of surface area so they don't lose too much water in their native arid climates.
There are many theories around this, but it is probably for protection.
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Why are cacti prickly
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cactus
its a CAM
some are the Joshua Tree, cactus some kinds of cactus is, Nopal cactus, Prickly pear cactus, and Black Lace Cactus :)
No. The pear tree is in the family Rosaceae (rose family) in the genus Pyrus, and the prickly pear cactus is in the Cactaceae family in the genus Opuntia. Source: Wikipedia.
cactus, ocotillo, catclaw, mesquite, etc.
The Prickly Pear Cactus
A prickly pear is a cactus. There is no commensalism or mutualism.
briars and berberis, very prickly !!
Aaron's beard prickly pear cactus and the Arizona barrel cactus are prickly plants. They begin with the letter A.
No, a cactus is a plant, not an animal.
apricot prickly pear cactus
Cactus
the cactus was so prickly, it actually punctured my skin.
The Artichoke Cactus is a prickly plant. It starts with the letter A.
the most widespread cactus is prickly pear
Tom Thumb Cactus is a prickly plant.
on a pear