UCSB EEMB 2 - MIDTERM 1 EXAM 2026/2027 QUESTIONS AND
ANSWERS A+ SCORE SOLUTION REVIEW GUARANTEED PASS
Mortality
Proportion of individuals of each age class that die before
reaching the next age class
Per capita death rate
An individual's chance of dying during a certain period
Survivorship
Likelihood of an individual surviving to reach a certain age
Fecundity
[mx] number of female offspring produced by each female
during each time period
Cohort
A group of individuals born within the same time frame/age
class
,Horizontal life table
Follows a cohort till death
Vertical life table
Samples all ages of a population at a single time
Life history strategy
The way a species partitions its energetic resources
Intrinsic rate of increase
Rmax - rate of increase that's inherent to an organism under
ideal conditions (r = b - d)
Iteroparous
Reproduces multiple times over lifespan
Semelparous
Reproduces once over lifespan (usually a lot in that one time -
"big bang" reproduction)
Do all populations have the potential for exponential growth?
,Yes
Exponential growth
Dn/dt = rn
Biotic potential
Rn ; usually limited by environment
Carrying capacity
K, # of individuals an environment can support
Are abiotic factors generally density-dependent or -
independent?
Density-independent
R-strategists
Species with high intrinsic rates of increase (found in
uncertain environments)
K-strategists
, Species who persist near/around k (found in more stable
environments)
Metapopulation
Largest habitat patch, has many subpopulations
Subpopulation
Linked by frequent movement to/from them, linked to main
metapopulation
Corridors
Habitats between habitat patches through which organisms
can move
Intermediate growth pattern
Continued growth over life span
Biological control
Use of natural environment to reduce population density of an
economically damaging species
Antagonistic interactions
ANSWERS A+ SCORE SOLUTION REVIEW GUARANTEED PASS
Mortality
Proportion of individuals of each age class that die before
reaching the next age class
Per capita death rate
An individual's chance of dying during a certain period
Survivorship
Likelihood of an individual surviving to reach a certain age
Fecundity
[mx] number of female offspring produced by each female
during each time period
Cohort
A group of individuals born within the same time frame/age
class
,Horizontal life table
Follows a cohort till death
Vertical life table
Samples all ages of a population at a single time
Life history strategy
The way a species partitions its energetic resources
Intrinsic rate of increase
Rmax - rate of increase that's inherent to an organism under
ideal conditions (r = b - d)
Iteroparous
Reproduces multiple times over lifespan
Semelparous
Reproduces once over lifespan (usually a lot in that one time -
"big bang" reproduction)
Do all populations have the potential for exponential growth?
,Yes
Exponential growth
Dn/dt = rn
Biotic potential
Rn ; usually limited by environment
Carrying capacity
K, # of individuals an environment can support
Are abiotic factors generally density-dependent or -
independent?
Density-independent
R-strategists
Species with high intrinsic rates of increase (found in
uncertain environments)
K-strategists
, Species who persist near/around k (found in more stable
environments)
Metapopulation
Largest habitat patch, has many subpopulations
Subpopulation
Linked by frequent movement to/from them, linked to main
metapopulation
Corridors
Habitats between habitat patches through which organisms
can move
Intermediate growth pattern
Continued growth over life span
Biological control
Use of natural environment to reduce population density of an
economically damaging species
Antagonistic interactions
