Annelids-In earthworms, respiration is through the skin, but gills are used to exchange oxygen and and carbon dioxide in other types of annelids. Arthropoda-Some arthropods have gills and some have a tracheal system to obtain oxygen and then get rid of carbon dioxide.nnelids-In earthworms, respiration is through the skin, but gills are used to exchange oxygen and and carbon dioxide in other types of annelids. Arthropoda-Some arthropods have gills and some have a tracheal system to obtain oxygen and then get rid of carbon dioxide.
Cistus, with its many hybrids and cultivars, is commonly encountered as a garden flower. The common name rockrose is applied to the species, a name also shared by the related genera Halimium, Helianthemum and Tuberaria, all in the family Cistaceae. The common name gum cistus is applied to resin-bearing species, especially C. ladanifer.
Drift roses were developed for use as flowering ground covers. Drift roses (Rosa Drift varieties), generally hardy in U.S. Department of Agriculture plant hardiness zones 4 or 5 through 11, are a series of ground-cover roses designed for versatility in landscape applications. Drift roses are wider than they are tall -- usually about 18 inches tall by 30 inches wide. The plants bloom repeatedly throughout the growing season and are simple to maintain.