The cactus is one of the few plants found in the desert, and in order to survive it needs a massive amount of water. Since it does not rain all year round in a desert, cacti store water when it does rain. So the needles on the cactus protect their water-rich flesh from other things in the desert.
The desert cactus
The jumping cholla [Cylindropuntia bigelovii] doesn't need to launch its thorns. The thorns just loosen easily in response to strong wind events, or contact. The cactus is native to North America. In Mexico, it's found in the Sonoran Desert. In the U.S., it's found in Arizona, California, and Texas. It's also known by a number of common names, including the ironic Teddy Bear cholla.
The desert cactus
The protective structure of a rose is the thorns. The thorns grow up and down the stems of the plant. It protects the plant from being eaten.
Leaves provide extra surface area for water to evaporate out of the plant. In the arid desert, plants need all the water they can get.
cactus thorns are made up of Leaves
cactus
defence. the cacti leaves are the thorns...
the thorns is a structural adaption of rose,cactus,bamboo
It's the thorns on cactus plants and roses that make them both difficult to hold. On both plants, the thorns serve to defend and protect the stem and the flower. But on the cactus, the thorn is a modified leaf. On a rose, the stem has both thorns and regular leaves.
no it is a mammle those thorns are really hairs
They vary in size from species to species and my be the size of nails or like small hairs.
The thorns on cacti are like seeds, if you want to reproduce a cactus you will probably need a green house, if you don't have a greenhouse you can take a plastic bag and poke small holes in it and drape it over the cactus. Cactus thorns are sharp and prickly they are a natural defence system.
The desert cactus
The jumping cholla [Cylindropuntia bigelovii] doesn't need to launch its thorns. The thorns just loosen easily in response to strong wind events, or contact. The cactus is native to North America. In Mexico, it's found in the Sonoran Desert. In the U.S., it's found in Arizona, California, and Texas. It's also known by a number of common names, including the ironic Teddy Bear cholla.
PRICKLY pear cactus
The desert cactus