Biology: The Unity and Diversity of Life (MindTap Course List)
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 24, Problem 1DAA
Summary Introduction

To explain: The trial in which the most control crabs and experimental bled crabs died.

Concept introduction: Horseshoe crab belongs to Phylum: Arthropod. They are normally found around shallow ocean waters. Horseshoe crabs are living fossils. Though the horseshoe crabs look like crustaceans, they are marine arachnids.

Expert Solution & Answer
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Explanation of Solution

The uniqueness of horseshoe crab is that they clot upon encountering bacteria. Therefore, they are used in experiments where highly virulent bacteria are involved. The blood of horseshoe crabs is taken and then, they are let out in their habitat in order to conserve their population, but this might also lead to their death. Therefore, experiments were conducted to check their survival after taking their blood and the results were obtained as seen in Fig.24.40 in the question.

In trial 5, the number of control crabs is 30; out of which, 1 died. In trial 5, the number of bled animals is 30; out of which, 6 died.

Conclusion

Conclusion: Trail group 5 marked the highest number of control crabs and bled crabs that died compared to the other trial groups.

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