For a species with a Type II survivorship curve, less than ____% of individuals survive for 50% of the maximum life span.

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Multiple Choice

For a species with a Type II survivorship curve, less than ____% of individuals survive for 50% of the maximum life span.

Explanation:
Type II survivorship means a constant death rate across ages, so the number of individuals alive declines steadily over time (survival follows an exponential decrease). Because mortality is ongoing at a constant rate, by the time you reach half of the species’ maximum life span, only a small fraction remains alive—far less than half. Among the given options, ten percent is the best upper bound for the proportion surviving to half the maximum life span, since the exact value depends on the constant mortality rate.

Type II survivorship means a constant death rate across ages, so the number of individuals alive declines steadily over time (survival follows an exponential decrease). Because mortality is ongoing at a constant rate, by the time you reach half of the species’ maximum life span, only a small fraction remains alive—far less than half. Among the given options, ten percent is the best upper bound for the proportion surviving to half the maximum life span, since the exact value depends on the constant mortality rate.

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