Biology Essentials- r and K Selection
Guided Viewing
1: What is “r” stand for?
-Growth Rate
2: What happens if we have a positive “r”?
-The animals will increase in numbers and have exponential growth
3: What is “N”?
-It is the number of individuals in the population
4: What is “K”?
-it is the Carrying Capacity
5: Explain the survivor ship curve. (Give an example for each)
It is the curve that sort of shows the life way and the average of how we live in years
TYPE I: Humans: Give a lot of parental care
TYPE II: song birds ( linear rate)
TYPE III: Frogs
6: How does the environment affect the survivor ship curve?
-The environments we live in differ and some are able to sustain and be stable and some cant hold much life
7: What are “r” selected species? Explain characteristics of these species.
-Those who base their life on the growth rate
-Unstable Environment
-High Fecundity
-Small body size
-Early Maturity
-Short Generation time
-These are the animals that want to quickly grow such as frogs
-Disperse Offspring
8: What are “K” selected species? Explain characteristics of these species.
-They live longer and more parental care
-Stable Environment
-Large Body size
-Long life expectancy
-High parental care
-Fewer Offspring
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Guided Viewing
1: What is “r” stand for?
-Growth Rate
2: What happens if we have a positive “r”?
-The animals will increase in numbers and have exponential growth
3: What is “N”?
-It is the number of individuals in the population
4: What is “K”?
-it is the Carrying Capacity
5: Explain the survivor ship curve. (Give an example for each)
It is the curve that sort of shows the life way and the average of how we live in years
TYPE I: Humans: Give a lot of parental care
TYPE II: song birds ( linear rate)
TYPE III: Frogs
6: How does the environment affect the survivor ship curve?
-The environments we live in differ and some are able to sustain and be stable and some cant hold much life
7: What are “r” selected species? Explain characteristics of these species.
-Those who base their life on the growth rate
-Unstable Environment
-High Fecundity
-Small body size
-Early Maturity
-Short Generation time
-These are the animals that want to quickly grow such as frogs
-Disperse Offspring
8: What are “K” selected species? Explain characteristics of these species.
-They live longer and more parental care
-Stable Environment
-Large Body size
-Long life expectancy
-High parental care
-Fewer Offspring
-