Campbell Biology: Australian And New Zealand Edition + Mastering Biology With Etext
11th Edition
ISBN: 9781488687075
Author: Lisa, A. Urry
Publisher: PEARSON
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Chapter 47, Problem 6TYU
In humans, identical twins are possible because
- a. cytoplasmic determinants are distributed unevenly in unfertilized eggs.
- b. extraembryonic cells interact with the Zygote nucleus.
- c. convergent extension occurs.
- d. early blastomeres ean form a complete embryo if isolated.
- e. the gray crescent divides the dorsal-ventral axis into new cells.
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Gastrulation...
A. Is a specialized form of cell division that partitions the cytoplasm of a fertilized egg
B. Refers to the fusion of haploid gametes to give a diploid zygote
C. Produces an embryo with either two or three distinct cell layers
D. Is a developmental stage consisting of a cell layer surrounding a fluid-filled space
E. None of the above
Which of the following is not true about starfish eggs? Choose all possible answers
a. eggs are fertilized prior to completion of the first meiotic divisions.
b. eggs are generally less yolky and therefore cleave meroblastically.
c. first two cleavage planes are meridional
d. Each quartet (blastomeres) occupies a plane lying perpendicular to the animal-vegetal axis.
e. All are true about the starfish eggs.
A preembryo has:- a. A neural tube. b. A heart bulge. c. A cytotrophoblast. d. A coelom. e. decidual cells
Chapter 47 Solutions
Campbell Biology: Australian And New Zealand Edition + Mastering Biology With Etext
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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