A) 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)
B) 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
C) it involves the uncontrolled combustion the biomass of an ecosystem. A wildfire 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
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 hiker
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
150. What does information function of ecosystem relate?
A) create an even larger variety of living biomass starting from photosynthesis
B) provide refuge and a reproduction habitat to wild plants and animals
C) regulate essential ecological processes and life support systems through bio-
geochemical cycles
D) the distribution of various species and ecosystems geographically
E) contribute to the maintenance of human health by providing opportunities
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