INTEGRAT PRINC OF ZOO (LL W/ CONNECT)
18th Edition
ISBN: 9781264177875
Author: HICKMAN
Publisher: MCG
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Chapter 8, Problem 9RQ
Using sea star embryos as an example, describe gastrulation. Explain how the mass of inert yolk affects gastrulation in frog and bird embryos.
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Describe the gastrulation by using embryos of the sea star as an example.And describe the way in which the mass of inert yolk influences the gastrulation in bird and frog embryos.
Using sea star embryos as an example, describe gastrulation. Explain how the mass of inert yolk affects gastrulation in frog and bird embryos
Explain how the flat embryonic disc takes on the cylindrical shape of a tadpole.
Chapter 8 Solutions
INTEGRAT PRINC OF ZOO (LL W/ CONNECT)
Ch. 8 - What is meant by epigenesis? How did Kaspar...Ch. 8 - How is an egg (oocyte) prepared during oogenesis...Ch. 8 - Describe events that follow contact of a...Ch. 8 - What is meant by the term activation in...Ch. 8 - How does amount of yolk affect cleavage? Compare...Ch. 8 - What is the difference between radial and spiral...Ch. 8 - What other developmental hallmarks are often...Ch. 8 - What is indirect development?Ch. 8 - Using sea star embryos as an example, describe...Ch. 8 - What is the difference between schizocoelous and...
Ch. 8 - Describe two different experimental approaches...Ch. 8 - What is meant by induction in embryology? Describe...Ch. 8 - What are homeotic genes and what is the homeobox...Ch. 8 - What is the embryological evidence that...Ch. 8 - What are the four extraembryonic membranes of...Ch. 8 - What is the fate of the four extraembryonic...Ch. 8 - Explain what the growth cone that Ross Harrison...Ch. 8 - Name two organ-system derivatives of each of the...Ch. 8 - Prob. 19RQCh. 8 - SCNT makes possible therapeutic cloning. What are...
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- ___________ removes webs between developing digits. a. Gastrulation c. Apoptosis b. Lactation d. Implantationarrow_forwardDefine and describe the main features of the following developmental stages: fertilization, cleavage, gastrulation.arrow_forwardIdentify the significance of gastrulation in the developmental process and compare gastrulation in the echinoderm (or in amphioxus), the amphibian, and the bird.arrow_forward
- Describe the step-by-step fertilization process in an amphibian. Include in the discussion the structures involved in the process.arrow_forwardDescribe the step-by-step fertilization process in an amphibian. (Please include the structures involved in the process.)arrow_forwardExplain gastrulation in fisharrow_forward
- Regarding mammals, amphibians, and reptiles, explain thoroughly in what way does the inert yolk's mass affects their gastrulation?arrow_forwardWith regard to early cleavage in the sea urchin, is the entire zygote involved in early cleavage? What happens to the size of cells as the cell number increases? Do they get bigger or smaller in these early stages? How does the size of these cells compare to the size of the original fertilized egg?arrow_forwardHow is the process of gastrulation accomplished in mammalian embryos?arrow_forward
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