Which 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

Which 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

Biology (MindTap Course List)

11th Edition

ISBN:9781337392938

Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Publisher:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Chapter51: Animal Development

Section: Chapter Questions

Problem 3TYU

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In an experiment described in lecture, a portion of tissue containing ZPA was transported to the anterior side of a limb bud. Limb development was compared in this limb bud compared to a limb bud in a chick with a single ZPA on the posterior side of the limb bud. What is the independent variable in this study? Group of answer choices A. the structure of the resulting limb buds B. the number of ZPA C. the number of limb buds D. the movement of the ZPA E. the size of the resulting limb buds
Researchers 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.
Which of the following is common to the development of bothbirds and mammals?(A) holoblastic cleavage(B) epiblast and hypoblast(C) trophoblast(D) gray crescent
Which of the following is not true about avian eggs? Choose all possible answers. a. exhibit holoblastic cleavage b. first cleavages are perpendicular to the plane of the blastodisc, and approximately at right angles to one another c. at the time of the fourth cleavage, a furrow running parallel to the circumference of the blastodisc separates central from peripheral forming blastomeres. d. portion of the undersurface of the blastoderm that is farthest from the source of gravity becomes the anterior end of the embryo. e. All of the following are true about eggs of frogs.
Which of the following will NOT induce a second body axis in a host embryo? a. Transplanting a ventral blastopore lip to a host embryo. b. Transplanting a dorsal blastopore lip to a host embryo. c. Activation of beta-catenin on the ventral side of an embryo. d. Transplanting a Nieuwkoop center on the ventral side of an embryo.
The experiment involving the movement of the zone of polarizing activity in the chick embryo demonstrated ... ? Group of answer choices a. control of formation of the dorsal/ventral axis in the chick b. control of front/back (anterior/posterior) axis formation at the two cell stage c. hormonal control of development continued after d. how cells move and adhere to one another to complete developmental changes e. formation of front/back (anterior/posterior) positional information in limb bud formation
Explain: Is the degenerating blastocoel visible in the frog gastrula? How much yolk protrudes through the blastopore of a frog gastrula How much yolk protrudes through the blastopore of a frog gastrula? Chickens lack a larval stage. How do they compensate for this?
An 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?
Which of the following statements is FALSE? a. VegT and Veg1 induce both dorsal and ventral mesoderm. b. Veg1 and VegT induce endoderm signals. c. Beta-catenin must enter the nuclei of cells on the dorsal surface for frog development to progress normally. d. Nodal is required to induce both the Organizer and ventral mesoderm.
Suppose we would want to have mirrored lateral sides (meaning both the left and right portion are equal) in a chick embryo to see how it would develop. How would we achieve this by manipulating the genes that dictates the development of the organs?
Describe the four membranes in the avian egg. How does EACH membrane affect the developing embryo?
Which of the following statements about gastrulation is correct? A. During gastrulation, the contents of cell nuclei begin to vary so that they can start to perform different fucntions. B. During gastrulation, cells differentiate so that they can start to perform different functions. C. The formation of the endoderm, mesoderm, and ectoderm occurs after gastrulation. D. The formation of the endoderm, mesoderm, and ectoderm occurs before gastrulation.