Which of the following statements about the graph is true?
A. Oysters live longer than Hydra.
B. Hydra and humans have parallel life spans.
C. Humans and oysters have similar life spans.
D. Humans have low mortality rates early in life.
E. Oysters have high mortality rates late in life.
Clarify question:
What is the key concept addressed by the question?
What type of thinking is required?
Gather Content:
What do you already know about the characteristics of the three survivorship curves? What other information is related to the question?
Choose Answer:
Given what you now know, what information is most likely to produce the correct answer?
Reflection on Process:
Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
D. Humans have low mortality rates early in life.
Clarify question:
What is the key concept addressed by the question?
The key concept is to analyze the graph and determine how the survivorship curves relate to each other.
What type of thinking is required?
This is an analyze question, you will need to analyze the graph to extract the data you need to answer the question.
Gather Content:
What do you already know about the characteristics of the three survivorship curves? What other information is related to the question?
How does the type III survivorship curve differ from the type I or the type II curves? Where does the maximal rate of mortality occur?
Choose Answer:
Given what you now know, what information is most likely to produce the correct answer?
In a type III curve there is very high initial mortality followed by a sharp decrease in mortality rate once the organism survives to adulthood. The strategy of producing lots of offspring is the best strategy to use here, which is the r-selected strategy.
Reflection on Process:
Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result? You needed to extract the information from the graph and decide which strategy was best. Were you able to determine from the graphs how each survivorship curve related to mortality rates and life spans for members of the population?
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