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.
Inhalation of respirable silica dust can cause silicosis a potentially disabling lung disease, and is known to the State. of California to cause lung cancer. When drilling, cutting, or abrading product during installation or handling. (3) Warn others in area. For further information, refer to material safety data sheet or consult employer. FAILURE TO ADHERE TO WARNINGS, MSDS, AND INSTALLATION INSTRUCTIONS MAY LEAD TO SERIOUS PERSONAL INJURY. James Hardieâs seal of approval indicates products recommended for use by James Hardie Building Products Circular saw with dust collector Circular saw blade with carbide-tipped teeth FRAMING REQUIREMENTS: