Does all spiders lives above the grounds?
Not all spiders live above ground. Wolf spiders live and layd eggs under ground. Tarantulas also like to live underground because they prefer cooler areas.
Spiders are essential to our lives and the lives of all other animals on our planet. Besides being fascinating cool creatures, "Spiders are primary controllers of insects," says Norman Platnick, who studies arachnids at New York's American Museum of Natural History. "Without spiders, all of our crops would be consumed by those pests." In other words, without spiders catching all those insects we all would face famine.
A parasite is an organism that lives in or on another organism and feeds off of it to no benefit of the host/victim (an alternative where there is a benefit is a symbiotic relationship as opposed to a parasitic one), without deliberately killing it. Some spiders do live part of their lives as parasites e.g. if eggs were laid under the skin. Spiders are commonly hunters and trap prey in webs, then consume them.
All spiders are venomous - they use their venom to disable their prey, and defend themselves from predators. Not all spiders have large enough fangs to bite through human skin though, and not all spiders have venom that is dangerous to humans, and most spiders will run away rather than bite you, if they can.
Not all spiders build webs (in fact, nearly half do not!) but all spiders do use silk. Most wolf spiders do not build webs, but they use silk to wrap their egg cases and to leave draglines or safety lines. Some males can follow a female's dragline Not all spiders build webs (in fact, nearly half do not!) but all spiders do use silk. Most wolf spiders do not build webs, but they use silk…