Biology: The Dynamic Science (MindTap Course List)
4th Edition
ISBN: 9781305389892
Author: Peter J. Russell, Paul E. Hertz, Beverly McMillan
Publisher: Cengage Learning
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Chapter 50, Problem 16TYK
Summary Introduction
To review:
The features of early development that are conserved across all vertebrates.
Introduction:
Early development of an organism includes three stages of development. These are cleavage, gastrulation, and neurulation. Cleavage begins as soon as the egg is fertilized. It includes the mitotic division of the zygote to produce gastrula. The gastrula undergoes gastrulation that leads to the formation of the germ layers by morphogenetic rearrangements of the cells.
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Chapter 50 Solutions
Biology: The Dynamic Science (MindTap Course List)
Ch. 50.1 - Prob. 1SBCh. 50.1 - Prob. 2SBCh. 50.2 - Prob. 1SBCh. 50.2 - Prob. 2SBCh. 50.2 - Prob. 3SBCh. 50.3 - Prob. 1SBCh. 50.3 - Prob. 2SBCh. 50.4 - Prob. 1SBCh. 50.4 - Prob. 2SBCh. 50.5 - Prob. 1SB
Ch. 50.5 - Prob. 2SBCh. 50.5 - Prob. 3SBCh. 50 - Prob. 1TYKCh. 50 - Prob. 2TYKCh. 50 - Prob. 3TYKCh. 50 - Prob. 4TYKCh. 50 - Prob. 5TYKCh. 50 - Prob. 6TYKCh. 50 - Prob. 7TYKCh. 50 - In the development of the female sex organs: a....Ch. 50 - In the embryonic development of the eye: a. the...Ch. 50 - Prob. 10TYKCh. 50 - Discuss Concepts Experimentally, it is possible to...Ch. 50 - Discuss Concepts Developmental biologist Lewis...Ch. 50 - Discuss Concepts Arguably, in sexually reproducing...Ch. 50 - Prob. 14TYKCh. 50 - Prob. 15TYKCh. 50 - Prob. 16TYKCh. 50 - Prob. 1ITDCh. 50 - Prob. 2ITDCh. 50 - Prob. 3ITDCh. 50 - Prob. 4ITD
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- Place these events in human development in the correct order. ____ 1 a. gastrulation is completed ____ 2 b. blastocyst forms ____ 3 c. tail is reabsorbed ____ 4 d. implantation occurs ____ 5 e. zygote forms ____ 6 f. neural tube forms ____ 7 g. maternal cervix softensarrow_forwardDuring morphogenesis, gastrulation does which of the following?A. Gastrulation produces the ectoderm through formation of a blastocyst.B. Gastrulation produces the mesoderm to form the lining of the digestive tract.C. Gastrulation provides the mechanisms whereby cells can form the neural tube.D. Gastrulation produces the endoderm through invagination of the blastula.arrow_forwardResearchers searched for an activator of neural tissue formation. What is the real pathway for this developmental phenomenon? a. Neural tissue formation occurs via BMP inhibition by proteins secreted from the organizer. b. Noggin activates ectoderm to become neural tissue. c. Nodal activation induces mesoderm to make neural tissue. d. Beta-catenin is required for formation of neural tissue.arrow_forward
- What is NOT true about embryo development? A. a morula is an earlier stage than a gastrula B. Gatrulation creates endoderm and ectoderm in most animals C. Mammal blastulas are called blastocysts due to the thickened area where the embryo develops D. diploblastic animals have mesodermarrow_forwardAddress the items below as they relate to human embryology; a) discuss when the germ layers of human development begin to form, explain how each originates, explain what each will differentiate into, and what happens to each layer immediately after formation b) distinguish the developmental differences between a 20 day old embryo and a 4wk embryo in humans.arrow_forwardAll of the following are true about humans EXCEPT: A. our zygote and early embryo cells have indeterminate cleavage B. Our blastopore becomes our mouth C. We are eumetazoan triploblastic bilateral deuterostomes D. our early embryo cells are sort of radially arranged but with rotational cleavagearrow_forward
- A 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_forwardWhich statement does NOT accurately describe somites? series of tissue blocks form the ribs and intercostal muscles paired structures running along either side of the neural tube derived from neural crest tissue on the ventral surface of the embryoarrow_forward. In humans, identical twins are possible because(A) extraembryonic cells interact with the zygote nucleus.(B) convergent extension occurs.(C) early blastomeres can form a complete embryo if isolated.(D) the gray crescent divides the dorsal-ventral axis into new cells.arrow_forward
- Using sea star embryos as an example, describe gastrulation. Explain how the mass of inert yolk affects gastrulation in frog and bird embryosarrow_forwardA gastrulation does NOT Select one: A. Consist of endoderm, mesoderm, and ectoderm B. Result in the formation of a third layer in the embryonic disc C. Involve the formnation of germ layers D. Include the differentiation of cells into tissues and organsarrow_forwardWhich of the following statements is false? a. Cadherins, but not integrins play a role in gastrulation. b. Gastrulation creates the primary germ layers c. Gastrulation requires cells to change their gene expression. d. Body axes are stabilized (made permanent) during gastrulation.arrow_forward
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