Try pulling it out and putting some proxide on it( its going to burn)
No.
Carefully pull the needles out and and squeeze/cut the cactus.
As in sewing needles or pinhead needles - no. But they're long, narrow and really pointy, which make them very much like needles.
D: Three long, one short
Within the protection of the cactus needles.
Cactus needles have a number of functions. Firstly, because cactus plants live in deserts and semi-arid areas, the needles reduce the loss of moisture that normally occurs through evaporation. As the cactus is a "flowering plant", like all plants in this family it has leaves, but in this case, the leaves are the needles. there is very little surface area on the needles, so less moisture is lost through evaporation. Because of the shape of the needles, they also help capture whatever moisture is available. Dew and other forms of precipitation will tend to drip from the needles to the soil directly around the roots of a cactus, enabling the roots to utilise as much of the moisture as possible. Cactus needles also deter plant-eating animals.
No, the saguaro has no leaves. They have been replaced by needles.
Some animals have special rough mouths that protect them from the hard pointy needles of the cactus. Like, a collared pecary
what is the advantage of hand sewing needles
The answer would be pine trees or any other plants that have pine needles
There a plenty of adaptations plants have and this would be a long answer. with that said look at the cactus for example. This plant not only stores water within for a very long time but also has needles that do several different things. The needles of a cactus shade the the cactus, not having leaves means less need for water, the needles are able to slow water down when in falls on the plant, in order for the plant to collect as much water as possible and since this plant must store water for a long time, the needles protect it from predator's Also cactus are completely green, doing away with leaves and allowing the skin of the plant to do the photosynthesis needed.
It has spines or needles to protect it and it can store water inside of it for dry days with no rainfall or water