1. What does destruction refer?

42. Choose the correct types of ecosystem:
A) Aquatic and ocean
B) Terrestrial and aquatic
C) Terrestrial and tundra
D) Forest and Terrestrial
E) Glassland and aquatic
43. Adaptations are inherited characteristics that help an organism to survive and 
reproduce in its environment. Looking both ways before crossing a street helps us 
survive because it is ...
A) a survival adaptation
B) learned through experience
C) an inherited survival experiences
D) learned from our parents
E) inherited from our parents
44. What substance is influenced by the damage of the ozone layer?
A) carbon dioxide
B) oxygen gas
C) ozone gas
D) freons
E) sulfur and nitrogen oxides
45
. Choose the correct determination for “physical stressors” as a stress factor in 
ecosystem modelling
A) caused by the release of heat (thermal energy) into the environment, which results in 
ecological stress because species vary in their tolerance of temperature extremes.It may 
occur at natural springs and submarine vents where geologically heated water is emitted. 
It is also associated with discharges of hot water from power plants
B) occurs when one or more substances occur in a concentration high enough to elicit 
physiological responses in organisms, potentially causing toxicity and ecological change 
(include pesticides, gases such as ozone and sulphur dioxide, and toxic elements such as 
arsenic and mercury)
C) involves the uncontrolled combustion of the biomass of an ecosystem. It can be ignited 
by people, or naturally by lightning. A severe fire consumes much of the biomass of an 
ecosystem, but even a less-severe wildfire may kill many organisms by scorching and 
poisoning by toxic gases

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D) a disturbance in which there is an intense exposure to kinetic energy, which causes 
damage to habitats and ecosystems. Examples include such disruptive events as a 
hurricane or tornado, a seismic sea wave (tsunami), the blast of a volcanic eruption, an 
explosion, or trampling by heavy machinery or hikers
E) it caused by excessive exposure to ionizing energy and may be emitted by nuclear 
waste or explosions, or it can be diagnostic X-rays or solar ultraviolet energy