JMU BIO 150: Exam 1 Question and
answers rated A+ (10 pgs)
Define biodiversity - correct answer ✔the diversity of plant and animal life in
a particular habitat (or in the world as a whole)
Define genetic diversity - correct answer ✔the total genetic information
contained within all individuals of a species, population, or community
Why is genetic diversity important? - correct answer ✔provides the raw
materials for adaptive change
Define adaptive change - correct answer ✔change in response to the
environment's "natural selection:
Define species diversity - correct answer ✔the diversity of species present in
a community
Why is species diversity important? - correct answer ✔species have a
particular "role" in a system, so the addition or loss of a species may have
consequences for the entire system
How is species diversity measures? - correct answer ✔-species richness
-species abundance
Define species richness - correct answer ✔number of species in a
community
, Define species abundance - correct answer ✔The number of individuals of
each species
Define ecosystem diversity - correct answer ✔measure of the variety of biotic
components in a region along with abiotic components
Why is ecosystem diversity important? - correct answer ✔ecosystem
functioning is dependent on interacting member organisms with their
environment
Define system stability - correct answer ✔diverse systems are resilient after
and resistant to disturbances
Define ecosystem productivity - correct answer ✔diverse systems have
higher net primary productivity
Define ecosystem services - correct answer ✔direct and indirect benefits that
humans derive from organisms and ecosystems
Define existence value - correct answer ✔economic value of a system and
our willingness to mitigate biodiversity loss
What are provisioning services? - correct answer ✔raw materials (food, fuel,
fiber, medicine, genetic resources)
What are regulating services? - correct answer ✔life support system (climate
moderation, soil formation, erosion control, water capture, flood control etc.)
answers rated A+ (10 pgs)
Define biodiversity - correct answer ✔the diversity of plant and animal life in
a particular habitat (or in the world as a whole)
Define genetic diversity - correct answer ✔the total genetic information
contained within all individuals of a species, population, or community
Why is genetic diversity important? - correct answer ✔provides the raw
materials for adaptive change
Define adaptive change - correct answer ✔change in response to the
environment's "natural selection:
Define species diversity - correct answer ✔the diversity of species present in
a community
Why is species diversity important? - correct answer ✔species have a
particular "role" in a system, so the addition or loss of a species may have
consequences for the entire system
How is species diversity measures? - correct answer ✔-species richness
-species abundance
Define species richness - correct answer ✔number of species in a
community
, Define species abundance - correct answer ✔The number of individuals of
each species
Define ecosystem diversity - correct answer ✔measure of the variety of biotic
components in a region along with abiotic components
Why is ecosystem diversity important? - correct answer ✔ecosystem
functioning is dependent on interacting member organisms with their
environment
Define system stability - correct answer ✔diverse systems are resilient after
and resistant to disturbances
Define ecosystem productivity - correct answer ✔diverse systems have
higher net primary productivity
Define ecosystem services - correct answer ✔direct and indirect benefits that
humans derive from organisms and ecosystems
Define existence value - correct answer ✔economic value of a system and
our willingness to mitigate biodiversity loss
What are provisioning services? - correct answer ✔raw materials (food, fuel,
fiber, medicine, genetic resources)
What are regulating services? - correct answer ✔life support system (climate
moderation, soil formation, erosion control, water capture, flood control etc.)
