Non-vascular plants include two distantly related groups: 1  Bryophytes-Bryophyta (mosses), Marchantiophyta (liverworts), and Anthocerotophyta (hornworts). 2  In these groups, the primary plants are the haploid gametophytes, with the only diploid portion being the attached sporophyte, consisting of a stalk and sporangium. In these groups, the primary plants are the haploid gametophytes, with the only diploid portion being the attached sporophyte, consisting of a stalk and sporangium. 2  Because these plants lack lignified water-conducting tissues, they can't become as tall as most vascular plants. 3  Algae-especially the green algae.
It is possible that welders are at greater risk of developing skin cancer than the general population, but there is a dearth of well designed studies in this area. The only major study of the relationship between arc welding and skin cancer risk did not reveal an increased incidence of skin cancer in welders.
Technical Bulletin. Lokringâ¢ & Welding: Mechanical Safety . OSHA Welding Health Hazard Statistics: âFifty-eight deaths from welding and cutting incidents, including explosions, electrocutions, asphyxiation, falls and crushing injuries were reported by the Bureau of Labor Statistics in 1993.â âFor the construction industry, welders flash (burn to the eyes) accounts for 5.6% of all construction eye injuries.â âIn Alberta Canada, 21% of workers compensation claims for eye injuries were to welders.â âUltraviolet radiation (UV) is generated by the electric arc in the welding process.