BSC2005 Exam 4 Questions and All
Correct Answers 2026-2027 Updated.
Ecology - Answer The study of the interactions of organisms with each other and with their
physical environment
Population - Answer All the members of the same species that live in a particular area
Ecosystem - Answer A community encompasses a community population, as well as the
nonliving environment
Biosphere - Answer All the ecosystems (air, water, land) on Earth including there biotic
communities
Biotic Potential - Answer The highest possible per capita rare if increase for a population
Environmental Resistance - Answer Total of factors in the environment that limit the numerical
increase of a population in a particular region. Also results in an s-shape called logistic growth
Exponential Growth - Answer Growth, particularly of a population, in which the increase
occurs in the same manner as compound interest
Carrying Capacity - Answer The number of individuals of a species that a given environment
can support
Lap Phase - Answer Growth is slow because the population is small
Exponential Growth Phase - Answer Growth is accelerating, due to biotic potential
Stable Equilibrium - Answer Little if any growth takes place because births and deaths are
about equal
Parasitism - Answer One party benefits and the other party is harmed
Commensalism - Answer One party benefits and the other party is not effected
Mutualism - Answer Both parties benefit
, Cohort - Answer A group of individuals born at the same time
Doubling Time - Answer The length of time it takes for the population size to double
MDC - Answer Population growth is slow and people enjoy a good standard of living
LDC - Answer Population growth is expanding rapidly and majority of people live in poverty
Demographic Transition - Answer Sequence of events (i.e decreased death rate followed by
decreased birthrate)
The Age-Structure Diagram divides the population into 3 age groups - Answer Preproductive,
reproductive, and post reproductive
Opportunistic Pattern (r-strategist) - Answer Populations that are small in size, mature early,
and have a short life span. (ex: Seahorse, plants)
Equilibrium Pattern (k-strategist) - Answer Tend to be large, slow to mature, and have a long
life span (ex: Bears, most mammals)
Density-Independent Factor - Answer The effects of the factors are the same for all sizes of
population (ex: weather and natural disasters)
Density-Dependent Factor - Answer Biotic factors, such as competition, predation, and
parasitism
Competition - Answer A density dependent factor, occurs when members of different species
try to use a resource (such as light, space, or nutrients) that is in limited supply
Ecological niche - Answer The role a species plays in the community, including the habitat it
requires and its interactions with other organisms
Competitive Exclusion Principle - Answer No two species can occupy the same ecological niche
at the same time if resources are limited
Correct Answers 2026-2027 Updated.
Ecology - Answer The study of the interactions of organisms with each other and with their
physical environment
Population - Answer All the members of the same species that live in a particular area
Ecosystem - Answer A community encompasses a community population, as well as the
nonliving environment
Biosphere - Answer All the ecosystems (air, water, land) on Earth including there biotic
communities
Biotic Potential - Answer The highest possible per capita rare if increase for a population
Environmental Resistance - Answer Total of factors in the environment that limit the numerical
increase of a population in a particular region. Also results in an s-shape called logistic growth
Exponential Growth - Answer Growth, particularly of a population, in which the increase
occurs in the same manner as compound interest
Carrying Capacity - Answer The number of individuals of a species that a given environment
can support
Lap Phase - Answer Growth is slow because the population is small
Exponential Growth Phase - Answer Growth is accelerating, due to biotic potential
Stable Equilibrium - Answer Little if any growth takes place because births and deaths are
about equal
Parasitism - Answer One party benefits and the other party is harmed
Commensalism - Answer One party benefits and the other party is not effected
Mutualism - Answer Both parties benefit
, Cohort - Answer A group of individuals born at the same time
Doubling Time - Answer The length of time it takes for the population size to double
MDC - Answer Population growth is slow and people enjoy a good standard of living
LDC - Answer Population growth is expanding rapidly and majority of people live in poverty
Demographic Transition - Answer Sequence of events (i.e decreased death rate followed by
decreased birthrate)
The Age-Structure Diagram divides the population into 3 age groups - Answer Preproductive,
reproductive, and post reproductive
Opportunistic Pattern (r-strategist) - Answer Populations that are small in size, mature early,
and have a short life span. (ex: Seahorse, plants)
Equilibrium Pattern (k-strategist) - Answer Tend to be large, slow to mature, and have a long
life span (ex: Bears, most mammals)
Density-Independent Factor - Answer The effects of the factors are the same for all sizes of
population (ex: weather and natural disasters)
Density-Dependent Factor - Answer Biotic factors, such as competition, predation, and
parasitism
Competition - Answer A density dependent factor, occurs when members of different species
try to use a resource (such as light, space, or nutrients) that is in limited supply
Ecological niche - Answer The role a species plays in the community, including the habitat it
requires and its interactions with other organisms
Competitive Exclusion Principle - Answer No two species can occupy the same ecological niche
at the same time if resources are limited
