No, not all pigs have tusks. Tusks are elongated, continuously growing teeth that are typically found in wild pigs, such as boars. Domesticated pigs bred for agricultural purposes usually do not have tusks.
Domestic pigs have both hair and tusks...the tusks are removed very close to birth for the safety of humans and other pigs. The hair is generally sparse compared to wild pigs but there are some domestic breeds that are hairier than others.
The males grow tusks and on occasion so do some females.
a lion, cheetah, any large animal
i believe you are talking about tusks?
The term hog refers to a large domestic pig. All domestic swine are true pigs from the old world. A peccary is a similar looking animal which is native to the new world. Pigs have tails and tusks while peccaries lack these. Pigs and peccaries last shared a common ancestor between 50-37 million years ago.
unless if it were a boar or a warthog
They do. Pigs are very adaptable. Feral pigs are a big problem in some areas.
no not in a barn. only in the wild .
Primitive species of pigs (such as bush pigs and wild pigs) have sharp tusks which are used to dig up roots. These roots and other similar plants such as tubers form the foundation for a wild pig's diet. Contrary to popular belief pigs are mainly herbivorous animals and their tusks are not used in hunting prey. --------------------- I take it he question is asking why natural selection favored pigs with sharp tusks. These tusks are offensive and defensive weapons, effective tools for foraging, and likely also used in courtship display. The animals that lacked them would not have been favored by natural selection for these reasons. The animals that lacked them would have been less able to forage for food, less able to defend themselves from rivals and predators, and quite probably less attractive to the opposite sex. These factors would gradually lead to a larger ratio of pigs with pronounced tusks in the population until eventually it became a common trait for the group.
Adult males develop tusks, continuously growing teeth that protrude from the mouth, from their upper and lower canine teeth. These serve as weapons and tools. The upper tusks are bent upwards in males, and are regularly ground against the lower ones to produce sharp edges. The tusks normally measure about 6 cm (2.4 in), in exceptional cases even 12 cm (4.7 in). Females also have sharp canines, but they are smaller, and not protruding like the males' tusks.[9][10]
a guinea pigs cousin would also be a guinea pig.