Plant kingdom could be divided into two major groups. They are Vascular plant group and non vascular plant group. However, there are some similarities as well as differences in between these two groups. This article intends to discuss the characteristics and comparison of these two groups.herefore, some plants in this group look like leaves (liverworts). Also, some plants have root like structures, which is called as rhizoids. Gametophyte generation is prominent in non vascular plants. Those gametophytes are haploids (contain single set of chromosome).
arc welding blindness. Anyone who does any welding or is watching someone do welding needs to wear a welding helmet. There are cases when it is not absolutely necessary. For example, thinking getting flashed by MIG welding on a sunny day is not too bad. The reason a helmet is necessary is because of the insanely bright light given off by welding. Without taking safety precautions, this light can literally burn the insides of your eyes and cause temporary or permanent blindness. Part of the reason is that particularly in dark places, the eye cannot adjust to the change in brightness fast enough to prevent damage.
Color Blindness. Color blindness, or color vision deficiency, is the inability or decreased ability to see color, or perceive color differences, under normal lighting conditions.There is no actual blindness.PubMed Health Glossary. (Source: Wikipedia).olor blindness, or color vision deficiency, is the inability or decreased ability to see color, or perceive color differences, under normal lighting conditions. There is no actual blindness. PubMed Health Glossary. (Source: Wikipedia).