BIO 202 CERTIFICATION EVALUATION
2026 QUESTIONS WITH ANSWERS GRADED
A+
⩥ How can biodiversity affect the way we decontaminate industrial
sites?
I) Bacteria have been found to be able to detoxify certain chemicals;
perhaps there are more.
II) Trees produce sawdust, which can be used to soak up chemicals.
III) Species evolving in contaminated areas could adapt and detoxify the
area. Answer: only I
⩥ The first step in ecosystem restoration is to _____.
a) remove competitive invasive species
b) restore the physical structure
c)remove toxic pollutants
d) restore native species that have been extirpated due to disturbance.
Answer: b) restore the physical structure
⩥ The goal of restoration ecology is to _____.
a) prevent further degradation by protecting an area with park status
b) replace a ruined ecosystem with a more suitable ecosystem for that
area
,c) return degraded ecosystems to a more natural state
d) manage competition between species in human-altered ecosystems.
Answer: c) return degraded ecosystems to a more natural state
⩥ The discipline that applies ecological principles to returning degraded
ecosystems to a more natural state is known as _____.
a) landscape ecology
b) resource conservation
c) restoration ecology
d) conservation ecology. Answer: c) restoration ecology
⩥ Which of the following would be considered an example of
bioremediation?
a) using a bulldozer to regrade a strip mine
b) adding seeds of a chromium-accumulating plant to soil contaminated
by chromium
c) dredging a river bottom to remove contaminated sediments
d) adding nitrogen-fixing microorganisms to a degraded ecosystem to
increase nitrogen availability. Answer: d) adding nitrogen-fixing
microorganisms to a degraded ecosystem to increase availability
⩥ Which process is not a natural threat to biodiversity?
a) Climate change.
b) Overhunting.
, c) Habitat alteration.
d) Extinction.. Answer: b) overhunting
⩥ How does the rate of species extinctions now compare with those
evidenced in the fossil record?
a) They have remained the same.
b) It is not possible to determine the rate of species extinctions in the
fossil record.
c) They have increased dramatically.
d) They have decreased dramatically.. Answer: c) they have increased
dramatically
⩥ Which process results in habitat destruction?
a) Pollution.
b) Introduction of invasive species.
c) Overhunting.
d) Damming rivers.. Answer: d) Damming rivers
⩥ True or false? Biologists studied the effects of forest fragmentation by
calculating the difference between the amount of plant biomass in the
edges of forest fragments and the interiors of unfragmented forest.
a) True
b) False. Answer: a) True
2026 QUESTIONS WITH ANSWERS GRADED
A+
⩥ How can biodiversity affect the way we decontaminate industrial
sites?
I) Bacteria have been found to be able to detoxify certain chemicals;
perhaps there are more.
II) Trees produce sawdust, which can be used to soak up chemicals.
III) Species evolving in contaminated areas could adapt and detoxify the
area. Answer: only I
⩥ The first step in ecosystem restoration is to _____.
a) remove competitive invasive species
b) restore the physical structure
c)remove toxic pollutants
d) restore native species that have been extirpated due to disturbance.
Answer: b) restore the physical structure
⩥ The goal of restoration ecology is to _____.
a) prevent further degradation by protecting an area with park status
b) replace a ruined ecosystem with a more suitable ecosystem for that
area
,c) return degraded ecosystems to a more natural state
d) manage competition between species in human-altered ecosystems.
Answer: c) return degraded ecosystems to a more natural state
⩥ The discipline that applies ecological principles to returning degraded
ecosystems to a more natural state is known as _____.
a) landscape ecology
b) resource conservation
c) restoration ecology
d) conservation ecology. Answer: c) restoration ecology
⩥ Which of the following would be considered an example of
bioremediation?
a) using a bulldozer to regrade a strip mine
b) adding seeds of a chromium-accumulating plant to soil contaminated
by chromium
c) dredging a river bottom to remove contaminated sediments
d) adding nitrogen-fixing microorganisms to a degraded ecosystem to
increase nitrogen availability. Answer: d) adding nitrogen-fixing
microorganisms to a degraded ecosystem to increase availability
⩥ Which process is not a natural threat to biodiversity?
a) Climate change.
b) Overhunting.
, c) Habitat alteration.
d) Extinction.. Answer: b) overhunting
⩥ How does the rate of species extinctions now compare with those
evidenced in the fossil record?
a) They have remained the same.
b) It is not possible to determine the rate of species extinctions in the
fossil record.
c) They have increased dramatically.
d) They have decreased dramatically.. Answer: c) they have increased
dramatically
⩥ Which process results in habitat destruction?
a) Pollution.
b) Introduction of invasive species.
c) Overhunting.
d) Damming rivers.. Answer: d) Damming rivers
⩥ True or false? Biologists studied the effects of forest fragmentation by
calculating the difference between the amount of plant biomass in the
edges of forest fragments and the interiors of unfragmented forest.
a) True
b) False. Answer: a) True
