Formation and Growth of Germ Band

The next stage is blastoderm differentiation, giving rise to the embryonic primordium (an area of closely packed columnar cells from which the future embryo forms) and the

FIGURE 20.2. Stages in cleavage and blastoderm formation in egg of Dacus tryoni (Diptera). (A) Frontal section through anterior end during 6th division; (B) transverse section after 8th division; (C) transverse section after 12th division; (D) transverse section during 13th division; (E) transverse section at syncytial blastoderm stage; and (F) frontal section through posterior end after formation of uniform cellular blastoderm. [After D. T. Anderson, 1972b, The development of holometabolous insects, in: Developmental Systems: Insects, Vol. I (S. J. Counce and C. H. Waddington, eds.). By permission of Academic Press Ltd., and the author.]

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.

Get My Free Ebook


Post a comment