Developmental Biology
Developmental Biology
11th Edition
ISBN: 9781605354705
Author: Scott F. Gilbert, Michael J. F. Barresi
Publisher: Sinauer Associates is an imprint of Oxford University Press
bartleby

Videos

Question
Book Icon
Chapter 8, Problem 1DQ
Summary Introduction

To review:

The effect of evolutionary adaptation of snakes which is related to the jaw modification to eat right coiler snails more easily compare to the left coilers, on the evolution of snails in the areas where both species coexist.

Introduction:

Snails often considered as the model organism in study of developmental biology, as they show modifications in their development correlated to the environmental condition. The establishment of the body axes follows different modes, depending upon the species. In case of the snail, twisting or spiral characterstic is the fundamental property. Two types of coiling is present in the snail shell, sinistral and dextral. Dextral coiling is the opening to the right of snail shell and the sinistral coiling is the opening of the snail shell to left.

Expert Solution & Answer
Check Mark

Explanation of Solution

The snail clevage is controlled by the maternal regulation. The left or right orientation pattern of the clevage plane is regulated by the cytoplasmic factors present in the oocyte. Dextral coiling and sinistral coiling is also regulated by the clevage pattern. Under the normal condition the coiling pattern of a species is the same for all members, but the mutations creats the differences. The studies reveals that a single gene is responsible for the sinistral and dextral coiling in snails. Sinistral group is present in minority, compare to dextral snails, which are more common. Mating between these two groups is neary impossible, due to the difference in orientation.

The evolutionary adaptation of snakes to eat right coiler snails, can impact the evolution of snails because the left coiler snail has found the advantage to survive the predation from the snakes. This resistance to snake predation makes the left coiler more suitable for the natural selection of species. Here, the mutation which provides the resistance from predation becomes beneficial for the snail, thus it may persistent for a number of generation and leads to make a distinct species.

Conclusion

Thus it is concluded that the jaw modification of snakes to eat right coiler snails, gives advantage to the left coiler snails and makes them more suitable to evolved as a distinct species during natural selection.

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!
Students have asked these similar questions
HAND DRAW There should be two pro
Molecular Biology Question. Please help solve. Thanks. Please draw how two nucleotide triphosphates are linked together to form a dinucleotide, and label the 5' and 3' ends of the resulting dinucleotide.
What is a reversion in molecular biology?

Chapter 8 Solutions

Developmental Biology

Knowledge Booster
Background pattern image
Biology
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.
Similar questions
SEE MORE QUESTIONS
Recommended textbooks for you
Text book image
Biology: The Dynamic Science (MindTap Course List)
Biology
ISBN:9781305389892
Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan
Publisher:Cengage Learning
Text book image
Biology 2e
Biology
ISBN:9781947172517
Author:Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher:OpenStax
Text book image
An Illustrated Guide To Vet Med Term
Biology
ISBN:9781305465763
Author:ROMICH
Publisher:Cengage
Text book image
Biology (MindTap Course List)
Biology
ISBN:9781337392938
Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg
Publisher:Cengage Learning
Text book image
Anatomy & Physiology
Biology
ISBN:9781938168130
Author:Kelly A. Young, James A. Wise, Peter DeSaix, Dean H. Kruse, Brandon Poe, Eddie Johnson, Jody E. Johnson, Oksana Korol, J. Gordon Betts, Mark Womble
Publisher:OpenStax College
Text book image
Human Heredity: Principles and Issues (MindTap Co...
Biology
ISBN:9781305251052
Author:Michael Cummings
Publisher:Cengage Learning
Reproduction: Crash Course Zoology #9; Author: CrashCourse;https://www.youtube.com/watch?v=poLyJDVjKlM;License: Standard youtube license