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.
There are four phyla, which are very divergent in form, but are now known to be close relatives based on various ultrastructural and genetic similarities: 1  Apicomplexa - parasitic protozoa that lack axonemal locomotive structures except in gametes. 2  Chromerida - a marine phylum of photosynthetic protozoa.