3 Review Sheet
is the scientific study of interactions among __________ and between
organisms and their _____________.
__________ contains the combined portions of the planet in which all of
life exists, including _________, _________, and _________, or
understand the various relationships within the biosphere, ecologists ask
questions about events and organisms that range in complexity from a single
individual of a particular species to a __________, ___________,
____________, __________, to the entire biosphere.
conduct modern ecological research according to three basic
_____________, and ____________.
is the main energy source for life on Earth.† In a few ecosystems, some organisms rely
on the energy stored in inorganic _________ __________.
two processes by which organisms produce energy-rich carbohydrates are
_______________ and _______________.
flows through an ecosystem in _______ direction(s), from the sun or
inorganic compounds to __________or producers and then to various
__________ or __________.
addition to herbivores, another type of consumer is a(an)
I and II only
II and III only
I, II, and III
series of steps in which a large fish eats a small fish that has eaten
algae is an example of a ___________.†
And when a number of these are put together to form a complex
network of feeding relationships, then it is called a _____________.
about _____ percent of the energy available within one __________ level is
transferred to organisms at the next level.
ecological ____________________ is a diagram that shows the relative
amounts of energy or matter contained within each trophic
level of a food chain or food web.†
__________ pyramid shows the total amount of living tissue within each
tropic level.† A __________ pyramid
shows the amount of individual organisms at each trophic
the flow of energy, __________ is recycled within and between ecosystems.
of the following is NOT true about matter in the biosphere?
cycles transform and reuse molecules.
total amount of matter decreases over time.
and nutrients pass between organisms and the environment.
order of certain steps in the water cycle are:
condensation, transpiration, and runoff.
condensation, transpiration, and precipitation.
condensation, precipitation, and runoff.
transpiration, precipitation, and evaporation.
living organism needs ____________ to grow and carry out essential life
functions.† Like water, these are
passed between organisms and the environment through ___________________
activity, such as the burning of fossil fuels is a process involved in the
- In the
nitrogen cycle, bacteria that live on the roots of plants
a) break down nitrogen compounds into nitrogen gas.
b) denitrify nitrogen compounds.
c) change nitrogen gas into plant proteins.
d) change nitrogen gas into ammonia.
is essential to living organisms because it forms part of important
life-sustaining molecules such as _______ and _______.† Most phosphorus exists in the form of
inorganic phosphate.† Some phosphate
stays on land and cycles between __________ and the __________.† It is also found in ___________
factor that controls the primary __________ of an ecosystem is the amount
of available ____________, which if in short supply will cause the
ecosystemís growth to be ___________.