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BIO 250 Exam 2 – Questions With Step By Step
Solutions
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Terms in this set (103)
Define fecundity The ability to reproduce
Define fertility The average number of offspring per reproductive
female
What is the relationship between life Organisms with a simple life cycle generally
cycle complexity and reproductive reproduce quicker
rate?
Describe a stage of life in which an The organism is attached to a surface (such as a rock)
organism is sessile?
What is a hermaphrodite? An organism with both male and female reproductive
organs
What is a life history? A collection of age or stage specific traits (or
demographic parameters) directly affecting an
individual's reproductive success
What is a K-species? A species which is generally large in size, has a long
lifespan, and few reproductive events
What is an r-species? A species which is generally small, with a short life,
and produces many offspring
What is geometric mean relative Number of young + probability of adults surviving to
fitness? reproduce next year
, How do you calculate the intrinsic r = (births - deaths)/(t*Navg)
growth rate (r)? t = timespan of study
Navg = average population size over the time of the
study
What is an age structure diagram? Characterizes the distribution of ages within a
population
Define birth rate Number of births per capita (person) per unit time
What is a cohort? A group of individuals in a population that were all
born around the same time
Describe how someone would study a Following a single cohort over time as they age
cohort using the dynamic method
Describe how someone would study a Studies multiple cohorts over time as they reach a
cohort using the static method single age range (e.g. studying elk between 2-5 yrs of
age for 15 years)
Describe the survivorship curve, what Shows the relationship between age (x-axis) and the
are on the x and y axes? number of survivors of a population (y-axis) -
populations generally have Type I, Type II, or Type III
Describe Type I survivorship High survivorship at young age and low at old age
Describe Type III survivorship Low survivorship at young age, but survivors
generally live for a long time
Describe Type II survivorship Linear relationship between age and number of
survivors
What is the Principle of Allocation? The idea that any energy or biomass used for one
function reduces the amount of energy available for
another function
BIO 250 Exam 2 – Questions With Step By Step
Solutions
Save
Terms in this set (103)
Define fecundity The ability to reproduce
Define fertility The average number of offspring per reproductive
female
What is the relationship between life Organisms with a simple life cycle generally
cycle complexity and reproductive reproduce quicker
rate?
Describe a stage of life in which an The organism is attached to a surface (such as a rock)
organism is sessile?
What is a hermaphrodite? An organism with both male and female reproductive
organs
What is a life history? A collection of age or stage specific traits (or
demographic parameters) directly affecting an
individual's reproductive success
What is a K-species? A species which is generally large in size, has a long
lifespan, and few reproductive events
What is an r-species? A species which is generally small, with a short life,
and produces many offspring
What is geometric mean relative Number of young + probability of adults surviving to
fitness? reproduce next year
, How do you calculate the intrinsic r = (births - deaths)/(t*Navg)
growth rate (r)? t = timespan of study
Navg = average population size over the time of the
study
What is an age structure diagram? Characterizes the distribution of ages within a
population
Define birth rate Number of births per capita (person) per unit time
What is a cohort? A group of individuals in a population that were all
born around the same time
Describe how someone would study a Following a single cohort over time as they age
cohort using the dynamic method
Describe how someone would study a Studies multiple cohorts over time as they reach a
cohort using the static method single age range (e.g. studying elk between 2-5 yrs of
age for 15 years)
Describe the survivorship curve, what Shows the relationship between age (x-axis) and the
are on the x and y axes? number of survivors of a population (y-axis) -
populations generally have Type I, Type II, or Type III
Describe Type I survivorship High survivorship at young age and low at old age
Describe Type III survivorship Low survivorship at young age, but survivors
generally live for a long time
Describe Type II survivorship Linear relationship between age and number of
survivors
What is the Principle of Allocation? The idea that any energy or biomass used for one
function reduces the amount of energy available for
another function
