To discourage animals from eating them.
The spines are an effective deterrent to herbivores, but also protect the plant stem. The spines increase the surface area available to collect moisture, an additionally help reflect the sun away from the stem and lower the stem temperature.
Cacti have spines to protect themselves form animals who want the water stores in the plant.
No not true. Spines on plants are sharp needle like that protect the plants from any harm. I think cacti have spines
To protect the plant from animals and people. For some, they provide shade and help to lower the surface temperature of the cacti
Yes, both the spines of cacti and the traps of the Venus fly trap are modified leaves. The spines on cacti help reduce water loss and protect the plant from herbivores, while the traps of the Venus fly trap are specialized for capturing and digesting insects to supplement its nutrient intake.
No, not all cacti have spines. Some species of cacti have smooth surfaces or small bumps instead of spines. Spines are a common feature in many cactus species, but not a universal one.
cacti
Cacti differ from other plants by having modified leaves called spines or needles, which help reduce water loss and protect the plant from animals. This adaptation allows cacti to thrive in arid environments where water is scarce.
An average number of spines on a cacti may vary from the species of the cacti. A desert cactus can grow up to 2000 spines without a problem. However, a normal house cactus can only grow up to 800-1000 spines.
All cactus have spines.
Cacti live in the deserts of the Americas and many have sharp spines. In Africa there are other plants, euphorbias for example, that resemble cacti but have thorns rather than spines.
A natural growth of spines in the body.