1. What does destruction refer?

22. The 
term “Ecosystem” was first coined by:
A) E.P. Odum
B) E. Heackel
C) E. Warming
D) V.I. Vernadsky
E) A.G.Tansley
23. Neutral point of pH scale for water equal:
A) 5, 5
B) 6.5-9.0
C) 7
D) <7
E) 0-14
24. Determine the process of transformation of an anthropogenic ecological system 
into an urban system?
A) deurbanization
B) regression
C) recovery
D) degradation

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E) urbanization
25. Which concept is about the amount of oil in the ground or greenhouse gases in 
the atmosphere?
A) Material flux rate
B) Residence time
C) Standing stock
D) Negative and positive feedback
E) Mass balance
26. By which activity are ecosystems destroyed?
A) Hunting
B) Selective logging
C) Over fishing
D) Poaching
E) Urbanization
27. The Climax communities are different from the presumed climax community is:
A) Autogenic succession
B) Retrogressive succession
C) Philosophic succession
D) Regressive succession
E) Defrected succession
28
. Choose the correct definition for the “ecosystem”.
A) the animal and plant life of a particular region, habitat, or geological period
B) a biological community of interacting organisms and their physical environment
C) a large naturally occurring community of flora and fauna occupying a major habitat, e.g. 
forest or tundra
D) the movement of chemical elements between organisms and non-living compartments 
of the atmosphere, lithosphere and hydrosphere
E) a naturally created biodiversity-rich hub, interconnected with ecological corridors, for 
operating ecological processes and ecosystem services