they have the spines to protect them from your face
There are several answers, depending on the spikes. Answers include:To protect the plant from herbivoresTo provide a layer of still air, to protect the cactus skin from excessive heatTo provide shade to the cactus skinOverall, the purpose seems to be related in some way to the plant's survival strategies.
The waste product found in cactus plants is usually latex, which can ooze out if a cactus is damaged or wounded. This sticky, milky substance helps the cactus protect itself from predators and heal its wounds.
The pointy things on a cactus are called spines.
Spines protect the plant from animals that would injure it. They also provide some shade for the stem of the plant.
To protect the plant from animals and people. For some, they provide shade and help to lower the surface temperature of the cacti
A cactus plant branch :D
well a cactus plant has many parts like flowers
A cactus is a plant. It does not eat.
A cactus is a plant, a dicot.
The cactus adapted to its harsh environment by developing thick skin to slow the evaporation of water. The leaves changed in order to reduce the surface area that water could evaporate from and over time became defensive spines to protect itself from animals trying to get inside its thick skin for the moisture. The cactus makes its food, by having chlorophyll throughout the rest of plant. That is why the entire cactus is green.
The tip of a cactus is where growth occurs in a cactus plant. If this is badly damaged the plant may die or begin to grow elsewhere in the plant giving the plant an abnormal appearance.