1. What does destruction refer?

85. Denitrification is not about:
A) Anaerobic respiration
B) Aerobic respiration
C) Microbial process
D) Glycolysis
E) Fermentation
86
. Identify the term of “biogeochemical cycle” in the ecosystems.
A) the increasing concentration of a compound in the tissues of organisms as the 
compound passes along a food chain, resulting from the accumulation of the compound at 
each trophic level prior to its consumption by organisms at the next trophic level, as seen 
with DDT
B) the movement of chemical elements between organisms and non-living compartments 
of
the atmosphere, lithosphere and hydrosphere
C) total dry weight of all organisms in a particular population, sample or area
D) refers to aspects of variety in the living world; used to describe the number of
species, the amount of genetic variation or the number of community types present in the 
area
E) the living together of two species (or organisms) in the same habitat, such as that 
neither tends to be eliminated by the other

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87. If you made a chart showing all the organisms living in the local lake, with 
arrows drawn between the various organisms showing the direction or pathway of 
energy flow, what kind of chart would you have made?
A) food web
B) ecosystem chart
C) energy pyramid
D) nutrient cycle
E) food chain
88. Which of following is artificial ecosystem?
A) Grass land
B) Agricultural land
C) Temperate rainforest
D) Hot desert
E) Savanna
89. What pushes limestone rock to the surface where it can be weathered?
A) Formation into gas and oil
B) Sediments and sedimentary rock formation
C) The rock cycles
D) Vegetation growth
E) Tectonic Earth movements