BIO 171 EXAM 4 ACTUAL QUESTIONS WITH
VERIFIED SOLUTIONS
◉ Primary productivity.
Answer: rate at which organic matter is created by producers in an
ecosystem
◉ secondary consumer.
Answer: An organism that eats primary consumers
◉ Tertiary consumer.
Answer: top carnivore
◉ Trophic level.
Answer: The organism's typical place in a food web
◉ Trophic (energy) pyramid.
Answer: Represents the distribution of biomass among trophic
levels
◉ lecture 21.
Answer: lecture 21
,◉ Bottom up ecosystem.
Answer: ecosystem controlled by nutrient supply, productivity, &
primary producers
◉ browse line.
Answer: The point up to which deer have been eating foliage
(vertically)
◉ deer.
Answer: animal that is way too over populated and destroy the
ecosystem by eating all vegetation
◉ defoliation.
Answer: occurs in this instance when leaf cutter ants are unchecked
by predators and eat the foliage of an ecosystem
◉ downgrading.
Answer: when ecosystems are disrupted because of the elimination
of species at the top of a food web, which in many cases are
predators.
◉ indirect effects.
, Answer: presence of one species may affect a second by way of
interactions with a third species
◉ kelp forest.
Answer: key to marine ecosystem
◉ keystone species.
Answer: most influential species in an ecosystem
◉ killer whale.
Answer: predator of grey whale
◉ largemouth bass.
Answer: keystone species in Mary Power's stream pools ecosystem,
when removed the algae was gone (bad)
◉ leaf cutter ants.
Answer: organisms that destroy foliage of an island when they are
unchecked by predators
◉ minnows.
Answer: predator of kelp & food for bass in Mary Powers ecosystem
VERIFIED SOLUTIONS
◉ Primary productivity.
Answer: rate at which organic matter is created by producers in an
ecosystem
◉ secondary consumer.
Answer: An organism that eats primary consumers
◉ Tertiary consumer.
Answer: top carnivore
◉ Trophic level.
Answer: The organism's typical place in a food web
◉ Trophic (energy) pyramid.
Answer: Represents the distribution of biomass among trophic
levels
◉ lecture 21.
Answer: lecture 21
,◉ Bottom up ecosystem.
Answer: ecosystem controlled by nutrient supply, productivity, &
primary producers
◉ browse line.
Answer: The point up to which deer have been eating foliage
(vertically)
◉ deer.
Answer: animal that is way too over populated and destroy the
ecosystem by eating all vegetation
◉ defoliation.
Answer: occurs in this instance when leaf cutter ants are unchecked
by predators and eat the foliage of an ecosystem
◉ downgrading.
Answer: when ecosystems are disrupted because of the elimination
of species at the top of a food web, which in many cases are
predators.
◉ indirect effects.
, Answer: presence of one species may affect a second by way of
interactions with a third species
◉ kelp forest.
Answer: key to marine ecosystem
◉ keystone species.
Answer: most influential species in an ecosystem
◉ killer whale.
Answer: predator of grey whale
◉ largemouth bass.
Answer: keystone species in Mary Power's stream pools ecosystem,
when removed the algae was gone (bad)
◉ leaf cutter ants.
Answer: organisms that destroy foliage of an island when they are
unchecked by predators
◉ minnows.
Answer: predator of kelp & food for bass in Mary Powers ecosystem
