ECCB Exam 2 Questions and Answers Solved Correctly
Geometric and Exponential Growth - Answers Resources are unlimited:
Logistic growth - Answers Resources are limited:
Geometric growth - Answers Population has discrete generations, such as one breeding season per year
Exponential growth - Answers Population does not have discrete generations; continuous
Logistic growth - Answers Continuous
Lambda - Answers Finite rate of increase, used for discrete generations, growth compounding at
constant intervals
r - Answers Per capital growth rate, continuous generations, growth compounding continuously
Density dependent - Answers Factors that affect population size in relation to the populations density
Negative density dependence - Answers When the per capita growth rate decreases as a population
density increases
Positive density dependence (allee effect) - Answers When the per capita growth rate increases as a
population density increases
Age structure - Answers The distribution of individuals among age classes within a population
Life history - Answers The schedule of an organisms growth, development, reproduction, and survival
Fecundity - Answers The number of offspring produced by an organism per reproductive episode
Parity - Answers The number of reproductive episodes an organism experiences
Parental investment - Answers The time and energy given to an offspring by its parents
Longevity - Answers The life span of an organism
Principle of allocation - Answers the observation that when resources are devoted to one body
structure, physiological function, or behavior, they cannot be allotted to another
Slow life history - Answers Long time to sexual maturity
Long life spans
Low numbers of offspring
High parental investment
(Elephants, oak trees)
, *K selected organisms
Fast life history - Answers Short time to sexual maturity
Short life spans
High numbers of offerings
Little parental investment
(Fruit flies, weeds)
*r selected organisms
Mutualism - Answers + +
Consumer resource - Answers + -
Competition - Answers - -
Commensalism - Answers + 0
Ammensalism - Answers - 0
Resource - Answers anything an organism consumes or uses that causes an increase in the growth rate
of a population when it becomes more available
Indirect competition - Answers Resource competition, exploitative competition
Direct competition - Answers Interference competition
Interspecific competition - Answers competition between members of different species; closely or
distantly related
Fundamental niche - Answers The complete set of conditions under which an organism could potentially
survive and reproduce
Realized niche - Answers Where the organism actually lives, given limitations created by interactions
with other species
Apparent competition - Answers When a species has a negative effect on another species through an
enemy, such as a predator, parasite/pathogen, or herbivore. It is NOT competition because it is not
mediated through a resource
Consumer - Answers Predator, herbivore, parasite
Resources - Answers Prey, plant, host
Predator - Answers Kills and consumes animals
Geometric and Exponential Growth - Answers Resources are unlimited:
Logistic growth - Answers Resources are limited:
Geometric growth - Answers Population has discrete generations, such as one breeding season per year
Exponential growth - Answers Population does not have discrete generations; continuous
Logistic growth - Answers Continuous
Lambda - Answers Finite rate of increase, used for discrete generations, growth compounding at
constant intervals
r - Answers Per capital growth rate, continuous generations, growth compounding continuously
Density dependent - Answers Factors that affect population size in relation to the populations density
Negative density dependence - Answers When the per capita growth rate decreases as a population
density increases
Positive density dependence (allee effect) - Answers When the per capita growth rate increases as a
population density increases
Age structure - Answers The distribution of individuals among age classes within a population
Life history - Answers The schedule of an organisms growth, development, reproduction, and survival
Fecundity - Answers The number of offspring produced by an organism per reproductive episode
Parity - Answers The number of reproductive episodes an organism experiences
Parental investment - Answers The time and energy given to an offspring by its parents
Longevity - Answers The life span of an organism
Principle of allocation - Answers the observation that when resources are devoted to one body
structure, physiological function, or behavior, they cannot be allotted to another
Slow life history - Answers Long time to sexual maturity
Long life spans
Low numbers of offspring
High parental investment
(Elephants, oak trees)
, *K selected organisms
Fast life history - Answers Short time to sexual maturity
Short life spans
High numbers of offerings
Little parental investment
(Fruit flies, weeds)
*r selected organisms
Mutualism - Answers + +
Consumer resource - Answers + -
Competition - Answers - -
Commensalism - Answers + 0
Ammensalism - Answers - 0
Resource - Answers anything an organism consumes or uses that causes an increase in the growth rate
of a population when it becomes more available
Indirect competition - Answers Resource competition, exploitative competition
Direct competition - Answers Interference competition
Interspecific competition - Answers competition between members of different species; closely or
distantly related
Fundamental niche - Answers The complete set of conditions under which an organism could potentially
survive and reproduce
Realized niche - Answers Where the organism actually lives, given limitations created by interactions
with other species
Apparent competition - Answers When a species has a negative effect on another species through an
enemy, such as a predator, parasite/pathogen, or herbivore. It is NOT competition because it is not
mediated through a resource
Consumer - Answers Predator, herbivore, parasite
Resources - Answers Prey, plant, host
Predator - Answers Kills and consumes animals
