Pearson eText Biology: Life on Earth with Physiology -- Instant Access (Pearson+)
12th Edition
ISBN: 9780135755785
Author: Gerald Audesirk, Teresa Audesirk
Publisher: PEARSON+
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Chapter 43, Problem 1AC
Summary Introduction
To explain:
The reason whether a second gastrula will develop two neural tubes if a researcher obtains two frog embryos at the gastrula stage of development when she transplanted cluster of cells into a second gastrula that will normally become skin.
Introduction:
Transplantation is a process of transfer of a piece of tissue containing cells from one gastrula to another. These cells differentiate into different tissues after this process in the gastrula.
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People could observe the development of an embryo before they had the tools to see cells and parts of cells such as DNA. How do you think they explained the development from embryo to organism?
Please answer the questions in 1-5 sentences only
What statement best describes the difference between "fate maps" and "specification"?
If cells are transplanted from their normal region in an embryo to a different region in a recipient embryo, such cells will alter their fate, but not their specification.
Cell fate map describes the allocation of cells to the germ layers, ectoderm, mesoderm, or endoderm, whereas specification describes the exact tissues that each cell will ultimately become.
The fate map of an embryo does not change during development -- the fate map of an egg is the same as the fate map of a late blastula -- whereas the specification map of an embryo changes continually as the embryo's development proceeds.
The fate map of a cell is determined by labelling that cell and following it during normal development, whereas the specification state of a cell is determined by culturing a cell in an artificial medium and observing what tissues form from it.
Which of the following structures of a mammalian embryo can be used to produce embryonic stem cells by simple maintenance in
culture? (Check all that apply.)
A Epiblast
Primitive endoderm
Trophectoderm
Blastocoel
Inner cell mass
Chapter 43 Solutions
Pearson eText Biology: Life on Earth with Physiology -- Instant Access (Pearson+)
Ch. 43.1 - define development and describe how cell division...Ch. 43.2 - Prob. 1CYLCh. 43.3 - describe early development in amphibians,...Ch. 43.3 - Prob. 2CYLCh. 43.4 - Prob. 1TCCh. 43.4 - Prob. 2TCCh. 43.4 - Does the development of a human limb, and the rest...Ch. 43.4 - Prob. 1CYLCh. 43.4 - Prob. 2CYLCh. 43.5 - Prob. 1TC
Ch. 43.5 - Prob. 1CSCCh. 43.5 - Prob. 2TCCh. 43.5 - Prob. 3TCCh. 43.5 - Prob. 1HYEWCh. 43.5 - describe human embryonic development from...Ch. 43.5 - describe the structure and function of the...Ch. 43.5 - Prob. 3CYLCh. 43.6 - Prob. 1TCCh. 43.6 - Prob. 1CYLCh. 43.6 - Prob. 2CYLCh. 43.6 - Prob. 3CYLCh. 43.6 - Prob. 2TCCh. 43 - Prob. 1MCCh. 43 - Animals with Indirect development a. develop...Ch. 43 - Prob. 3MCCh. 43 - Prob. 4MCCh. 43 - Prob. 5MCCh. 43 - Prob. 6MCCh. 43 - Prob. 7MCCh. 43 - Prob. 8MCCh. 43 - Prob. 1FIBCh. 43 - Prob. 2FIBCh. 43 - Prob. 3FIBCh. 43 - Prob. 4FIBCh. 43 - Distinguish between direct and indirect...Ch. 43 - Describe the structure and function of the four...Ch. 43 - What is gastrulation? Describe gastrulation in...Ch. 43 - Prob. 4RQCh. 43 - Prob. 5RQCh. 43 - In humans, where does fertilization occur, and...Ch. 43 - Prob. 7RQCh. 43 - Prob. 8RQCh. 43 - How do changes in the breast prepare a mother to...Ch. 43 - Prob. 10RQCh. 43 - Prob. 1ACCh. 43 - Prob. 2AC
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- From what you know about embryonic development, do you think that a cell from the inner cell mass or one from the ectoderm has more developmental potential?arrow_forwardThe development of a zygote into a baby involves pre-embryonic development for the first 2 weeks, followed by embryonic development for the next 6 weeks, and finally fetal development until the baby is born. When is the developing baby considered a fetus? Select one: a. When all major organ systems have formed b. After the neural tube forms c. Once gastrulation is complete d. When most major organ systems have formed; the neural system forms during the fetal stagearrow_forwardWhat four types of cellular processes must occur to enable a fertilized egg to develop into an adult multicellular animal? Briefly discuss the role of each process. C2. The arrangement of body axes of the discuss the role of each process.arrow_forward
- Review the stages of early development in animals. How are these stages similar in the animals you have studied? How do they differ? Complete Table 25.3. Thank youarrow_forwardAt which of the following stages of development is a frog embryo composed of the most cells? Group of answer choices A. blastula B. neural tube stage C. gastrula D. zygote (fertilized egg)arrow_forwardWhich of the following statements relating to axis formation in chickens is FALSE? a. Henson's node secretes proteins that antagonize BMPs. b. The side of the epiblast facing the negative, basic albumin will become the ventral side of the embryo. c. Cells of the posterior marginal zone secrete Nodal to initiate the primitive streak. d. Water and sodium ions are transported from the albumin through the blastodisc cells and into the subgerminal space.arrow_forward
- In insect embryonic development, the fertilized egg nucleus divides repeatedly giving rise to multiple nuclei that migrate to the periplasm (peripheral cytoplasm) and become cells called ____ or remain in the yolk and become cells called ____ that digest the yolk. A region of the cells that form in the periplasm thickens and become the____ , which develops into the embryo.arrow_forwardWhich of the following rows correctly identifies the development of the germ layers? Select one: A. Endoderm Mesoderm Ectoderm Placenta Muscle Hair and nails B. Endoderm Mesoderm Ectoderm Stomach and intestine Lining Reproductive system Brain and Spinal Cord C. Endoderm Mesoderm Ectoderm Muscle Bones Epidermis D. Endoderm Mesoderm Ectoderm Lungs and stomach linings Heart and Lungs Liver and pancreasarrow_forwardThe epiblast and hypoblast both develop from the inner cell mass cells in the mammalian embryo. The hypoblast becomes a specific structure that is known by two different names. What is this structure? Provide both names. 1. The hypoblast becomes the: ___________________ 2. The hypoblast becomes the: ____________________ Provide the name of the structure that is where gastrulation begins in each animal model. In the case of the frog and fish, this structure is known by two different names – there is a space below to provide each name. 1. Xenopus (frog): ___________________ 2. Xenopus (frog): ____________________ 3. Zebrafish: ____________________ 4. Zebrafish: ____________________ 5. Mammals: ____________________arrow_forward
- Discuss all the processes involved in the development of the following organs:1. Insect wing and legs2. Vertebrate limb3. Teeth4. Vertebrate lungs, heart and eyesarrow_forwardAn additional notochord is grafted next to the developing neural tube. Answer the following questions. (a) what new cells would you expect to develop in the region of the neural tube closest to the graft? (b) What is the notochord-derived molecule that is responsible for the effect?arrow_forwardA human is a complex organism that develops from a zygote. Briefly explain some of the the steps in this development process in the form of a paragraph. In your answer, be sure to: 1) explain how a zygote formed, 2) compare the genetic content of the zygote to the body cells of the parents, 3) identify the structure in which embryonic/fetal development usually occurs within, and 4) identify the structure that forms, which provides nourishment and waste removal to/from the developing baby.arrow_forward
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Embryology | Fertilization, Cleavage, Blastulation; Author: Ninja Nerd;https://www.youtube.com/watch?v=8-KF0rnhKTU;License: Standard YouTube License, CC-BY