Formation of Extra Embryonic Membranes

Simultaneously with gastrulation and somite formation, two extra-embryonic membranes, the amnion and serosa, develop from the extra-embryonic ectoderm (Figure 20.9). Cells at the edge of the germ band proliferate and the tissue formed on each side folds ventrally to give rise to the amniotic folds. These meet and fuse in the ventral midline to form inner and outer membranes, the amnion and serosa, respectively, the former enclosing a central fluid-filled amniotic cavity. Many authors have suggested that such a cavity would

Beekeeping for Beginners

Beekeeping for Beginners

The information in this book is useful to anyone wanting to start beekeeping as a hobby or a business. It was written for beginners. Those who have never looked into beekeeping, may not understand the meaning of the terminology used by people in the industry. We have tried to overcome the problem by giving explanations. We want you to be able to use this book as a guide in to beekeeping.

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