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What is the relationship between snails and Elodea? How does the color of phenol red demonstrate this relationship?

What is the relationship between snails and Elodea? How does the color of phenol red demonstrate this relationship?

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Hi can please get some help on questions 3, and 5. I’m kind of stuck on them. Thanks
**Lab Activity: Investigating Interdependence Between Plants and Animals** In this activity, you and your group will design an experiment to explore the relationship between consumers (aquatic snails) and aquatic plants (Elodea) in a closed system to demonstrate their interdependence. **Research Question:** Is there an interdependence between plants and animals? *Write your hypothesis here:* --- **Experiment Design:** You will design an experiment to test your hypothesis, collect data, and make conclusions based on your results. **Materials Provided:** - Sprigs of the aquatic plant Elodea - Aquatic snails - Containers with lids - Pond water (or deionized water without chlorine) - 0.02% phenol red solution (pH indicator) - Labeling tape and a marker **Safety Precaution:** Wash your hands thoroughly after handling snails. --- **Designing Your Experiment:** Collaborate with your group to address the following questions: 1. Which organism(s) release CO₂? 2. Which organism(s) take in CO₂? 3. Will they perform the process in the presence or absence of light? 4. How would you use the Phenol Red indicator? 5. How would you demonstrate interdependence between the two organisms? **Instructions:** - Draw your experimental design and describe it thoroughly. - Carefully consider the questions and use the provided materials to create your experiment. - Ensure that you include appropriate controls and note that not all materials need to be used. ---
Transcribed Image Text:**Lab Activity: Investigating Interdependence Between Plants and Animals** In this activity, you and your group will design an experiment to explore the relationship between consumers (aquatic snails) and aquatic plants (Elodea) in a closed system to demonstrate their interdependence. **Research Question:** Is there an interdependence between plants and animals? *Write your hypothesis here:* --- **Experiment Design:** You will design an experiment to test your hypothesis, collect data, and make conclusions based on your results. **Materials Provided:** - Sprigs of the aquatic plant Elodea - Aquatic snails - Containers with lids - Pond water (or deionized water without chlorine) - 0.02% phenol red solution (pH indicator) - Labeling tape and a marker **Safety Precaution:** Wash your hands thoroughly after handling snails. --- **Designing Your Experiment:** Collaborate with your group to address the following questions: 1. Which organism(s) release CO₂? 2. Which organism(s) take in CO₂? 3. Will they perform the process in the presence or absence of light? 4. How would you use the Phenol Red indicator? 5. How would you demonstrate interdependence between the two organisms? **Instructions:** - Draw your experimental design and describe it thoroughly. - Carefully consider the questions and use the provided materials to create your experiment. - Ensure that you include appropriate controls and note that not all materials need to be used. ---
### Educational Content: Understanding Ecological Interdependence **3. Exploring the Relationship Between Snails and Elodea** - **Research Question**: What is the relationship between snails and Elodea? How does the color of phenol red demonstrate this relationship? - **Explanation**: Phenol red is an indicator that changes color in response to pH shifts, often caused by carbon dioxide (CO2) levels. Snails and Elodea exhibit interdependence in an aquatic ecosystem: snails release CO2 during respiration, which Elodea uses in photosynthesis. This interaction affects the pH balance, which can be visualized using phenol red. **4. Setting Controls and Drawing Conclusions** - **Research Question**: What are the different types of control you need to show the interdependence? What conclusion can you make if the water in the tube that lacks any organism changes color? - **Control Types**: Different control setups involve using phenol red as an indicator by itself, both in light and dark conditions. This helps isolate the effects of respiration and photosynthesis on CO2 levels. - **Conclusion**: If the phenol red changes color in the absence of organisms, it suggests CO2 is present due to cellular respiration, confirming its release and the dynamic interaction within the system. **5. Application: The Importance of Aquatic Plants in Aquariums** - **Challenge**: Explain why you need to add aquatic plants to your aquarium. - **Explanation**: Aquatic plants like Elodea are vital as they absorb CO2 and release oxygen through photosynthesis, maintaining a balanced ecosystem. This supports aquatic life by stabilizing pH levels and providing essential oxygen for other organisms. This content can help students understand the dynamic relationships and dependencies among aquatic organisms and their environment.
Transcribed Image Text:### Educational Content: Understanding Ecological Interdependence **3. Exploring the Relationship Between Snails and Elodea** - **Research Question**: What is the relationship between snails and Elodea? How does the color of phenol red demonstrate this relationship? - **Explanation**: Phenol red is an indicator that changes color in response to pH shifts, often caused by carbon dioxide (CO2) levels. Snails and Elodea exhibit interdependence in an aquatic ecosystem: snails release CO2 during respiration, which Elodea uses in photosynthesis. This interaction affects the pH balance, which can be visualized using phenol red. **4. Setting Controls and Drawing Conclusions** - **Research Question**: What are the different types of control you need to show the interdependence? What conclusion can you make if the water in the tube that lacks any organism changes color? - **Control Types**: Different control setups involve using phenol red as an indicator by itself, both in light and dark conditions. This helps isolate the effects of respiration and photosynthesis on CO2 levels. - **Conclusion**: If the phenol red changes color in the absence of organisms, it suggests CO2 is present due to cellular respiration, confirming its release and the dynamic interaction within the system. **5. Application: The Importance of Aquatic Plants in Aquariums** - **Challenge**: Explain why you need to add aquatic plants to your aquarium. - **Explanation**: Aquatic plants like Elodea are vital as they absorb CO2 and release oxygen through photosynthesis, maintaining a balanced ecosystem. This supports aquatic life by stabilizing pH levels and providing essential oxygen for other organisms. This content can help students understand the dynamic relationships and dependencies among aquatic organisms and their environment.
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