biology 1
Every time people do something to the environment, reactions usually happen as predicted.
False
Introducing additional organisms of the same existing kinds will not upset the ecosystem.
False
Nature is not balanced as long as a state of dynamic equilibrium exists.
False
Only people upset the balance of nature.
False
All forms of life on earth are linked together in some type of food relationship.
True
Everything living depends on something else for its life.
True
Habitats vary because environmental factors vary.
True
Nothing is free in nature; what is removed must be replaced.
True
Organisms with similar requirements usually compete for environmental factors.
True
The ultimate source of energy for physical life on earth is the sun.
True
Unnatural occurrences can have the most significant impact on an ecosystem.
True
Energy moves through the plants and animals in an ecosystem by way of _____.
a food chain
The state that is ultimately reached which results in balance is called .
equilibrium
The diversity of plants and animals on Earth is supported by the numerous kinds of available.
habitats
A habitat that has lots of light and water, a high elevation, low temperature, and a low level of oxygen is most likely a _____ habitat.
high mountain
The word ecology is made up of two Greek words, oikos and logia, and means "_____."
house knowledge
Common needs, mutual benefit, and interactions are all examples of .
interdependence
The basic materials needed for life originate from the environment.
nonliving
Which statements reflect dynamic equilibrium of an ecosystem?
number of existing organisms will reflect changing factors any change on either side will require a compensation on the other side
Environmental factors may be studied using .
space satellites
How do phytoplankton affect the ecosystem of the entire earth?
through the oxygen cycle