Mastering Biology with Pearson eText -- ValuePack Access Card -- for Campbell Biology: Concepts & Connections
8th Edition
ISBN: 9780321928054
Author: Jane B. Reece, Martha R. Taylor, Eric J. Simon, Jean L. Dickey, Kelly A. Hogan
Publisher: PEARSON
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Chapter 27, Problem 17TYK
Summary Introduction
To determine:
The outcome of the experimentas thought by the researcher and to predict the possible results and to determine the control of the experiment.
Introduction:
Notochord is a rod shaped cartilaginous skeletal structure in all the embryonic and some adult chordates. It has essential functions in the growth and development of vertebrates. It is the primitive beginning of the backbone. Sometimes in embryo it can be seen as a small flexible rod, which is formed from the middle layer of the embryo.
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Which of the following is false? a. The endoderm, mesoderm, ectoderm are germ layers. b. The trophoblast is a germ layer. c. The inner cell mass is a source of embryonic stem cells. d. The blastula is often a hollow ball of cells.
Which of the following is not derived from the ectoderm? a. adrenal medulla b. epidermis of skin c. liver d. nervous system
The folding of ectoderm on the top of the embryo during organogenesis produces...?
Group of answer choices
a. somites
b. the archenteron
c. the neural tube
d. the gastrula
e. the blastula
Chapter 27 Solutions
Mastering Biology with Pearson eText -- ValuePack Access Card -- for Campbell Biology: Concepts & Connections
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- Which of the following gives rise to the skin cells? a. ectoderm b. endoderm c. mesoderm d. none of the abovearrow_forwardWhich tissue type or organ is correctly matched with its germ layer tissue? A) nervous–mesoderm B) muscular–ectoderm C) stomach–mesoderm D) skin–ectodermarrow_forwardEndoderm, Mesoderm, and Ectoderm are formed during ________. a. Gametogenesis b. Cleavage c. Gastrulation d. Organogenesisarrow_forward
- Component of bilaminar germ disc: a.Hypoblast and endoderm b.Epiblast and hypoblast c.Epiblast and ectoderm d.Ectoderm and mesodermarrow_forwardWhat are the correct pairings of developing and embryonic structures in the gastrulation of chickens? Multiple answers is possible. If no correct option is given write the proper pairings. a. Epiblast – ectoderm b. Secondary hypoblast – endoderm c. Primary hypoblast – endoderm d. Migrating cells - mesodermarrow_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
- Name two structures derived from each of the three embryonic tissue layers: endoderm, ectoderm, and mesoderm.arrow_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_forwardWhich of the following statements is incorrect?a. The placenta secretes hormones such as progesterone, hCG, and estrogen.b. Embryonic tissue and maternal tissue forms the placenta.c. The chorion supplies nutrients to the embryo by diffusion.d. The umbilical cord is formed by one artery and two veinsarrow_forward
- Name the three embryonic tissue layers of vertebrate embryos,and describe the process by which they arisearrow_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_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
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