Vehicle ownership by expats in Saudi. Public transport is almost negligible in Saudi Arabia. As an expatriate, it is really convenient if you have a car of your own. For those of you with your families, it is almost impossible to survive without a vehicle.
Phyla with a true coelom and digestive system are divided into two groups, the protostomes and the deuterostomes. As the hollow sphere of cells known as a blastula develops, an invagination produces an opening called the blastopore. In protostomes, the blastopore becomes the mouth.
Polychaeta, composed of about 10,000 species, is the larger (and apparently not monophyletic) of the two generally recognized major groups of segmented worms (phylum Annelida) â the other being the Clitellata (earthworms and leeches).olychaeta, composed of about 10,000 species, is the larger (and apparently not monophyletic) of the two generally recognized major groups of segmented worms (phylum Annelida) â the other being the Clitellata (earthworms and leeches).