CAMPBELL BIOLOGY-MASTERING BIO.ACCESS
12th Edition
ISBN: 9780136486787
Author: Urry
Publisher: SAVVAS L
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Textbook Question
Chapter 47, Problem 7TYU
Cells transplanted from the neural tube of a frog embryo to the ventral part of another embryo develop into nervous system tissues. This result indicates that the transplanted cells were
- a. totipotent.
- b. determined.
- c. differentiated.
- d. mesenchymal.
- e. apoptotic.
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If cells from the presumptive neural ectoderm of a frog gastrula are transplanted onto the surface of a second gastrula where skin would normally develop, the transplanted cells will still develop into tissues of the nervous system. This experiment shows that the transplanted cells areA. differentiated.B. totipotent.C. discontinuous.D. determined.E. endodermal.
The expression of homeotic genes leads to
a. the establishment of body axes.
b. the formation of segments in the embryo.
c. the determination of structures within segments.
d. cell differentiation.
Which mechanism prevents an ovum from being fertilized by multiple sperm cells?
Select one:
a. When more than a single sperm cell fuses with the plasma membrane, multiple zygotes can form, leading to the conception of twins or triplets.
b. When a sperm fuses with the plasma membrane of the egg, depolarization of the membrane occurs.
c. Once a sperm penetrates the jelly-like coating of the egg, no other sperm cells can penetrate the coating.
d. The egg can only survive in the Fallopian tube for 24 hours as it does not have mitochondria to produce energy.
Chapter 47 Solutions
CAMPBELL BIOLOGY-MASTERING BIO.ACCESS
Ch. 47.1 - How does the fertilization envelope form in sea...Ch. 47.1 - Prob. 2CCCh. 47.1 - MAKE CONNECTIONS Review Figure 12.16 on cell...Ch. 47.2 - In the frog embryo, convergent extension elongates...Ch. 47.2 - WHAT IF? Predict what would happen if Ca2+ was...Ch. 47.2 - MAKE CONNECTIONS Unlike some other types of birth...Ch. 47.3 - Prob. 1CCCh. 47.3 - Prob. 2CCCh. 47.3 - Prob. 3CCCh. 47.3 - Prob. 4CC
Ch. 47 - What cell-surface event would likely fail if a...Ch. 47 - What are some functions of apoptosis in...Ch. 47 - Suppose you found two classes of mouse mutations,...Ch. 47 - Prob. 1TYUCh. 47 - Which of the following is common to the...Ch. 47 - The archenteron develops into a. the mesoderm. b....Ch. 47 - What structural adaptation in chickens allows them...Ch. 47 - Prob. 5TYUCh. 47 - In humans, identical twins are possible because a....Ch. 47 - Cells transplanted from the neural tube of a frog...Ch. 47 - DRAW IT Each blue circle in the figure below...Ch. 47 - EVOLUTION CONNECTION Evolution in insects and...Ch. 47 - Prob. 10TYUCh. 47 - Prob. 11TYUCh. 47 - Prob. 12TYUCh. 47 - SYNTHESIZE YOUR KNOWLEDGE Occasionally, two-headed...
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- Which of the following is not true about frogs eggs and blastula formation? Choose all possible answers a. denser yolk in the animal hemisphere. b. Cleavage is holoblastic c. first cleavage plane is meridional and bisects the gray crescent, revealing the existence of some factor(s) that determine(s) the initial orientation of the cleavage spindle. d. first furrow also marks the plane of bilateral symmetry in the body e. All four blastomeres differ in sizes. f. All of the following are true about eggs of frogs.arrow_forwardFor pattern formation to occur, the cells in the developing embryo must a. “know” their position in the embryo. b. be determined during the earliest divisions. c. differentiate as they are “born.” d. must all be reprogrammed after each cell division.arrow_forwardDuring development, cells become a. differentiated before they become determined. b. determined before they become differentiated. c. determined by the loss of genetic material. d. differentiated by the loss of genetic material.arrow_forward
- Which of the following embryonic cell movements involves the desperation of cells from a continuous sheet of cells? A. Epiboly B. Involution C. Ingression D. Convergent extensionarrow_forwardWhich of the following statements about iPS cells is correct? A. They are derived from embryonic stem cells. B. Transcription factors play a key role in their production. C. When implanted into a mouse blastocyst, they are not able to produce viable offspring. D. They have never been used in a human clinical trial.arrow_forwardWhy is it easier to manipulate embryonic stem cells to differentiate into various tissues than it is to manipulate a typical adult cell? a. As cells develop, signaling pathways can cause some genes to be turned off during development. b. Adult cells have different DNA content than do embryonic stem cells. c. Emybronic stem cells pose less of a threat for organ rejection as do an individual s own adult cells. d. It is no easier to manipulate emybronic stem cells to differentiate into various tissues than it is to manipulate a typical adult cell.arrow_forward
- 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.arrow_forwardWhich of the following is NOT an example of cell migration as a part of cell differentiation? A. Mesenchyme cells forming mesoderm during gastrulation B. Primitive streak formation in a chick embryo C. Concentration of protein complexes during cleavage D. Convergent extension to elongate the archenteron in the sea urchinarrow_forwardA. CRANIAL (CEPHALIC) NEURAL CREST B. TRUNK NEURAL CREST C. VAGAL AND SACRAL NEURAL CREST Trace their differentiation pathways from the time the precursor cells break away from the neural tube. Make sure that this three (3) derivatives utilize different migratory pathways.arrow_forward
- The mesoderm gives rise to a. structures derived from epidermis, such as hair, feathers, nails, or claws. b. the lining of the digestive tract, pancreas, and liver. c. only the liver. d. the heart, blood vessels, muscle, and bones.arrow_forwardThe expression of maternal-effect genes directly leads to a. the establishment of body axes. b. segmentation. c. determination. d. cell differentiation.arrow_forwardIn Figure 13-2, the transplantation of certain regions of embryonic tissue induces the development of structures in new places. What are these special regions called, and what are the substances they are proposed to produce?arrow_forward
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