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.
Warts are caused by human papillomavirus, or HPV, whereas genital herpes is caused by herpes simplex virus, or HSV. Warts are not a form of herpes, and HPV will not cause genital herpes. Conversely, genital herpes does not cause cervical cancer or anal cancer. There are more than 100 types of HPV. Different types are associated with infections in different areas of the body and different forms of persistent infection.