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.
But there are hundreds of other environmental chemicals that are found in human breast tissue, so itâs hard to be sure that parabens can cause cancer alone. Aluminium in deodorants. There is no good evidence that aluminium in deodorants could increase the risk of cancer in animals or humans. This was confirmed by a review of all of the available evidence in 2014 that found no link. A small study in 17 women with breast cancer was quite widely reported in the news in 2007.