1. What does destruction refer?

57. What does the term "environmental quality" mean in ecosystem modelling?
A) the ability of ecosystems to maintain a sustainable balance
B) the permissible rate of anthropogenic pressure on natural resources, which does not 
lead to a violation of the stability of ecosystems
C) maximum anthropogenic load on natural components, leading to environmental 
degradation
D) the degree to which the characteristics of the environment meet the needs of people 
and technological requirements
E) permissible emission of harmful substances
58. Choose the correct ecosystem which is self-regulating, open system with a free 
exchange of inputs and outputs with other systems.
A) Fish aquarium
B) Crop field
C) Agricultural land
D) Tropical rainforest
E) Artificial garden
59. Which of the following is not a type of detritus food chain?
A) Salt marsh
B) Deep ocean floor
C) Predator chain
D) Forest floor
E) Woodland stream

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60. In a marine food chain, small fish eat plankton, big fish eat small fish, and 
sharks eat big fish. Which organism has the smallest population?
A) the sharks
B) the big fish
C) the plankton
D) the decomposer
E) the small fish
61. What does damage refer?
A) chronic human impacts resulting in the loss of biodiversity
B) to return a degraded ecosystem to its historic trajectory, not its historic condition
C) damage removes all macroscopic life and commonly ruins the physical environment
D) to chronic human impacts resulting in the loss of the disruption of an ecosys
tem’s 
structure
E) an acute and obvious harmful impact upon an ecosystem
62
. Choose the correct definition for the “ecosystem”.
A) the animal and plant life of a particular region, habitat, or geological period
B) a large naturally occurring community of flora and fauna occupying a major habitat, e.g. 
forest or tundra
C) a naturally created biodiversity-rich hub, interconnected with ecological corridors, for 
operating ecological processes and ecosystem services
D) a biological community of interacting organisms and their physical environment
E) the movement of chemical elements between organisms and non-living compartments 
of the atmosphere, lithosphere and hydrosphere