Campbell Biology (10th Edition)
10th Edition
ISBN: 9780321775658
Author: Jane B. Reece, Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Robert B. Jackson
Publisher: PEARSON
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Chapter 47.2, Problem 3CC
MAKE CONNECTIONS → Unlike some other types of birth defects, neural tube defects are largely preventable. Explain (see Figure 41.4).
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7. Which of the following best explains the development of twins?
a. In the case of both identical and fraternal twins, the placenta and chorion may be shared, but it is very rare for both the placenta and the amniotic sac to be shared.
b. In the case of fraternal twins, each fetus usually has its own placenta, chorion, and amniotic sac. Identical twins may each have their own placenta, chorion, and amniotic
sac. In some cases, they share the placenta and the chorion; it is very rare for both the placenta and amniotic sac to be shared.
c. In the case of both identical and fraternal twins, each twin has its own placenta, chorion,
nd amniotic sac.
d. In the case of fraternal twins, each fetus usually has its own placenta, chorion, and amniotic sac. Identical twins share the placenta and the chorion, and sometimes the
amniotic sac.
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Developmental Biology Question.
Look at the figure attatched and list two similarites and two differences between the group of cells on the top arrow and the group of cells on the bottom arrow. Brief explanations would be appreciated.
Chapter 47 Solutions
Campbell Biology (10th Edition)
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 - Prob. 47.2CRCh. 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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- Visit this site (http://openstaxcollege.org/l/pregstages) for a summary of the stages of pregnancy, as experienced by the mother, and view the stages of development of the fetus throughout gestation. At what point in fetal development can a regular heartbeat be detected?arrow_forwardDevelopmental Biology Questio: List two similarites and two differences between the cells on the top arrow and the cells on the bottom arrow. Please explain and make it neat and detailed.arrow_forwardDiscuss Concepts Arguably, in sexually reproducing animals, development begins when eggs and sperm form in the parents. In a paragraph, explain the rationale for this idea.arrow_forward
- Fill in the blank. Maternal effect occurs because proteins and RNA specified by maternal genes accumulate in the _____ of the oocyte and influence the early development of the embryo.arrow_forwardHow would mutations that completely ablate the function of the androgen receptor impact the phenotypic development of humans with XY chromosomes? Patients would appear phenotypically female Patients would appear phenotypically male with underdeveloped secondary sex characteristics Patients would appear phenotypically male, but cannot produce sperm Patients would express both male and female secondary sex characteristics.arrow_forwardObservation 1: 1 out of 2 first trimester abortuses show abnormal karyotypes with 96% caused by numerical abnormalities and 4% with structural abnormalities. At live birth, 1 out of 160 has abnormal karyotypes with 60% caused by numerical changes. This number increases with fetuses of mothers over 35 years old to 1/50 for total incidence and 85% for numerical changes. Questions: Think of reasons why it is important to maintain the number and structure of chromosomes. Why is maternal age so important?arrow_forward
- explain further. What are the characteristics of the cleavage embryo?arrow_forward--------------- A. Answer the following questions briefly (3-5 sentences only).1. How are the three axes for symmetry in the animal bodies established?2. Explain how the different germ layers give rise to different tissue types.3. Explain the role of axis formation in development B. write down the autapomorphic traits for the c3, c4, CAM plants and include their distinct environments Link: https://www.nature.com/scitable/knowledge/library/the-ecology-of-photosynthetic-pathways-15785165/arrow_forwardPlease explain ASAP!arrow_forward
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