Question: Suppose an organism is consuming some food. The term homeostasis refers to a state in which the nutrient content of the consumer is independent of the nutrient content of its food. Let z represent the nutrient content of the food, and y the nutrient content of the consumer. (Assume r and y are both positive) Part A: In the absence of homeostasis, the following model has been proposed: dy_ 1 y dr where 0 >1 is a constant. If we know y(1) = 1, solve this differential equation. Part B: Your answer in part a should depend on 0. On the same plot, sketch the solutions y for the following 0 values: 0 = 1,2, 3, and 4. Part C: What happens when 0 → oo? Sketch the resulting solution and describe its biological significance.

Linear Algebra: A Modern Introduction
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Author:David Poole
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Section4.6: Applications And The Perron-frobenius Theorem
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Question:
Suppose an organism is consuming some food. The term homeostasis refers to
a state in which the nutrient content of the consumer is independent of the nutrient content
of its food. Let z represent the nutrient content of the food, and y the nutrient content of
the consumer. (Assume r and y are both positive)
Part A: In the absence of homeostasis, the following model has been proposed:
dy_ 1 y
dr
where 0 >1 is a constant. If we know y(1) = 1, solve this differential equation.
Part B: Your answer in part a should depend on 0. On the same plot, sketch the
solutions y for the following 0 values: 0 = 1,2, 3, and 4.
Part C: What happens when 0 → oo? Sketch the resulting solution and describe its
biological significance.
Transcribed Image Text:Question: Suppose an organism is consuming some food. The term homeostasis refers to a state in which the nutrient content of the consumer is independent of the nutrient content of its food. Let z represent the nutrient content of the food, and y the nutrient content of the consumer. (Assume r and y are both positive) Part A: In the absence of homeostasis, the following model has been proposed: dy_ 1 y dr where 0 >1 is a constant. If we know y(1) = 1, solve this differential equation. Part B: Your answer in part a should depend on 0. On the same plot, sketch the solutions y for the following 0 values: 0 = 1,2, 3, and 4. Part C: What happens when 0 → oo? Sketch the resulting solution and describe its biological significance.
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