Answer:
From fertilization and to the end of the second week.
Explanation:
The development of the fetus is divided into three periods, established by most embryologists: pre-embyonic period, which goes from fertilization to the second week of development, embryonic period, which goes from the third week to the eighth week, and the fetal period, which goes from from the third month until the end of pregnancy.
The pre-embyonic stage begins at fertilization and remains until gastrulation. By the end of the second week the embryo already has the neural tube formed, although it is still open at both ends.
Answer:
You can solve drainage problems and create an attractive landscape feature at the same time with a dry creek bed. Build a creek bed to direct water away from a low spot in your yard. Or if the slope of the ground permits it, use a creek bed to drain a low spot.
Answer:
Co pay
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