Biology: The Unity and Diversity of Life (MindTap Course List)
14th Edition
ISBN: 9781305073951
Author: Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr
Publisher: Cengage Learning
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Chapter 42, Problem 3SQ
Summary Introduction
Concept introduction: The process where the zygote undergoes several changes to form a youngling is known as development. During the development, the regulated gene expression takes place. As a result, the morphogens are produced that regulate how the organism should develop into a youngling.
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Homeotic gene expression _______. a. occurs via bacterial operons b. maps out the overall body plan in embryos c. triggers formation of a specific body part
Cells at the 4 cell stage of an embryo are _______ compared to cells at the 32 cell stage of the same embryo?
Group of answer choices
A. larger
B. smaller and more differentiated
C. about the same size
D. smaller
E. smaller and less differentiated
A. 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.
Chapter 42 Solutions
Biology: The Unity and Diversity of Life (MindTap Course List)
Ch. 42 - The end product of cleavage is a __________. a....Ch. 42 - The outermost germ layer in a vertebrate gastrula...Ch. 42 - Prob. 3SQCh. 42 - Match each term with the most suitable...Ch. 42 - In humans, fertilization typically occurs in the...Ch. 42 - The ________, a fluid-filled sac, surrounds and...Ch. 42 - Prob. 1DAACh. 42 - Prob. 2DAACh. 42 - Prob. 3DAACh. 42 - Birth Defects and Multiple Births A woman who...
Ch. 42 - The placenta consists of __________. a. embryonic...Ch. 42 - During the fetal period, ____________. a....Ch. 42 - Prob. 9SQCh. 42 - Match each hormone with its action(s). ______...Ch. 42 - Prob. 11SQCh. 42 - Prob. 12SQCh. 42 - Prob. 13SQCh. 42 - Prob. 14SQCh. 42 - Prob. 15SQCh. 42 - The rubella virus causes German measles. If a...Ch. 42 - Prob. 2CTCh. 42 - Prob. 3CT
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- ________is an example of reproductive cloning. a. Somatic cell nuclear transfer (SCNT) b. Multiple offspring from the same pregnancy c. Artificial embryo splitting d. In vitro fertilizationarrow_forwardEmbryonic stem cells have the potential to do all of the following except _____. a be rejected by a recipient's immune system b differentiate into almost any type of cell in the body c only able to grow into a similar type of cell d repair cells damaged by injury or diseasearrow_forwardMorphogens area. molecules that disrupt normal development.b. molecules that convey positional information and promote changesin development.c. mutagenic agents that cause apoptosis.d. receptors that allow cells to adhere to the extracellular matrix.e. both a and carrow_forward
- During 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_forward1. After receiving the SR signal, stem cells in the developing organism will have an increased potential to specialize. The __ genes, when expressed, enable these embryonic stem cells the capacity to differentiate. A. SR B. Skin Diff C. ID D. Neural Diff E. DIV F. DET Please answer in short and ASAP .arrow_forwardA cytoplasmic determinant can control development at the early stages of development because....? Group of answer choices a. it is a universal activator of all genes b. it is present evenly throughout the cytoplasm c. it is activated by cell division d. it is controlled by genes present in the cytoplasm e. it is laid down in the egg cell by the motherarrow_forward
- Blood islands are ________.a. clusters of blood-filtering cells in the placentab. masses of pluripotent stem cells scatteredthroughout the fetal bone marrowc. vascular tubes that give rise to the embryonictubular heart d. masses of developing blood vessels and formedelements scattered throughout the embryonic discarrow_forwardWhy are dominant mutations in proto-oncogenes generally not inherited? A. Inherited mutations in proto-oncogenes would not affect cell division rate B. Inherited mutations in proto-oncogenes would decrease cell division rate and no viable embryo would form C. Inherited mutations in proto-oncogenes would increase cell division rate and no viable embryo would form D. Dominant mutations in proto-oncogenes are always inheritedarrow_forwardAn individual can inherit a gene in which expression has been altered by an ________ change with no mutation of the gene sequence. Choose the description in column 2 that best matches each gene in column 1. p53 c-myc A. tumor suppressor gene B. oncogenearrow_forward
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