Agricultural economies are still used in some countries of the Middle East, especially where other natural resources are few. These economies are often associated with a lower standard of living. Herding and livestock raising is a common means of income in areas too dry for farming. Animals raised include cattle, goats, and sheep. Farming often occurs along the coasts, but may also occur in drier areas if irrigation watering methods are used. Some people choose to practice subsistence farming methods, growing only enough food to feed their families. With little fertile soil in the region, it is tough to make a living growing and selling large quantities of crops. Major crops in the Middle East include wheat, cotton, and citrus fruit.
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Following gastrulation, the next major development in the embryo is neurulation, which occurs during weeks three and four after fertilization. This is a process in which the embryo develops structures that will eventually become the nervous system
A as the bacteria grows its resistance based on the amount of people using that specific antibiotic and allowing the bacteria to adapt.
First he should measure how long it takes for the liquid to become clear if X and Y are mixed together. Then he should measure how long it takes if he also adds substance A to X and Y. He will find out if substance is a catalyst
