Class Trematoda: Infect the internal organs of hosts. Parasitic Can be endoparasites (live in the host) or ectoparasites (attach to external surfaces of the host. Size: ~ 1 cm to 10 cm Covered in an unciliated cuticle. Usually require 2 hosts to complete it's life cycle.
Warts are generally caused by a human virus known as papilloma while moles are generally related with age and caused by hormones and environmental factors. There are cases when kids are born with moles but in general moles on the face increase with increase in age.
Difference between Wart and Boil. Key Difference: A wart is a rough growth that appears most commonly on the hands and fingers or on the soles of the feet. They can also appear on the other parts of the body like the face, arms or legs and sometimes grow in the genital or anal area. A boil, on the other hand, is an infection of the hair follicle. A boil is a deep folliculitis and is also called a furuncle. A wart and a boil are two common skin conditions that occur among people. They can cause severe damage if extreme cases are not treated on time.