PEARSON ETEXT FOR CAMPBELL BIOLOGY
12th Edition
ISBN: 9780135988046
Author: Urry
Publisher: PEARSON
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Textbook Question
Chapter 47, Problem 47.1CR
What cell-surface event would likely fail if a sperm contacted an egg of another species?
Expert Solution & Answer
Summary Introduction
To identify: The cell-surface event that has failed in case a sperm contacts an egg of different species.
Introduction:
The process of binding of a sperm to a receptor on the egg surface is species specific. There are many events that lead to the fusion of plasma membranes of egg and sperm.
- 1. The sperm contacts the jelly coat of egg.
- 2. The release of enzymes from the acrosomes.
- 3. Fusion of the sperm and egg plasma membrane.
- 4. Release of cortical granules and formation of fertilization envelope.
- 5. Entry of the sperm nucleus.
Explanation of Solution
There are some cell specific surface proteins that is essential for the fusion of sperm and egg. These protein are necessary for the proper recognition. If the gametes are from different species it is not possible for the sperm to induce the acrosome reaction. It is not possible for the sperm to burn its way through the egg’s outer layer.
Conclusion
All the reactions of the fertilization is possible only if the sperm and egg are from the same species. It would not occur if the sperm and egg are from different species.
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INTRODUCTION
LABORATORY SIMULATION
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Ch.23
How is Salmonella able to cross from the intestines into the blood?
A. it is so small that it can squeeze between intestinal cells
B. it secretes a toxin that induces its uptake into intestinal epithelial cells
C. it secretes enzymes that create perforations in the intestine
D. it can get into the blood only if the bacteria are deposited directly there, that is, through a puncture
—
Which virus is associated with liver cancer?
A. hepatitis A
B. hepatitis B
C. hepatitis C
D. both hepatitis B and C
—
explain your answer thoroughly
Chapter 47 Solutions
PEARSON ETEXT FOR CAMPBELL BIOLOGY
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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