Biology: The Unity and Diversity of Life (MindTap Course List)
14th Edition
ISBN: 9781305544703
Author: STARR
Publisher: Cengage
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Question
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
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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Now, let's investigate growth in another population: bedbugs!
Let's say a college in Kentucky experienced a bedbug infestation, and biology students were asked to help study the problem. Bedbugs are insects that live inside of mattresses (and other similarly warm places) and feed on the blood of sleeping humans. The origin of the bedbug infestation was traced to a student who accidentally brought a few bedbugs in his luggage, after spending a long weekend in New York City. Bedbugs reproduce sexually. In an infested room with a 4 m2 dorm bed, biology students find a population of 1200 bed bugs. In one month, they find that 240 bedbugs die, and 600 new bedbugs hatch. The maximum number of bedbugs is limited by the size of the bed that they live in.
What is the density of bedbugs in the dorm bed studied by the biology students? (Explain)
Animal Reproduction Interactivity
Can you describe how an aquarium moon jellyfish population will change over time?
Record Data and Observations
Part 1 Explore the Life Cycle
For each transition in the jellyfish life cycle, indicate whether it is the result of growth, sexual reproduction, or asexual reproduction. Provide the evidence that supports your choice for each.
Adult medusas to larvae
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Analyze and Conclude
1. Draw Conclusions Once polyps have been established and are producing juvenile medusas, is sexual reproduction required to provide adult medusas for the exhibit? Explain why or why not.
2. Scientific Writing The museum has asked you to make a sign for the exhibit. Visitors will read the sign when guides and volunteers are not available to talk about the exhibit. Using the information gathered in this interactivity, write a paragraph that…
Chapter 24 Solutions
Biology: The Unity and Diversity of Life (MindTap Course List)
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