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.
A _____ is a segment of DNA that has the instructions for making one protein. gene. When two homologous chromosomes are lined up right next to each other during meiosis, they are referred to as a ___. tetrad. An organism's gametes have ___ the number of chromosomes as are found in the organism's body cells.