WorksheetsBIO Ch 4 & 5 Review: Ecosystems and Populations
Total questions: 75
Worksheet time: 2hrs 3mins
Which type of ecosystem is this?
Open Ocean
Coral Reef
Lake
River
The study of relationships between plants, animals and their environment
Snakes
Carnivore
Herbivore
Omnivore
Brown Bear
Carnivore
Herbivore
Omnivore
Example of decomposer of
Bacteria
Fungi
Earthworms
All
Decomposers do not need energy to live.
True
False
How does the food chain start?
Plant life uses energy from the sun to make food.
Insects like grasshoppers eat plant life.
Animals like rats eat insects.
Humans eat large animals and plant life.
How do consumers get energy to live?
They make their own food from the soil.
They break down decaying matter.
They make their own food from the sun.
They eat other plants and animals.
A single path of energy transfer within an ecosystem.
They represent how water is transferred within an ecosystem.
If a disease strikes the snakes the rabbits will
increase
decrease
not be affected
If a disease strikes the snakes the hawks will
increase
decrease
not be affected
These mushroom are heterotrophs and must therefore get nutrients from other organic matter. Mushroom also act as a ____________________ in many food webs.
Organism that is able to capture energy from sunlight or chemicals and use it to produce its own food from inorganic compounds; also called a producer
(a)
Process in which chemical energy is used to produce carbohydrates
(a)
Organism that obtains food by consuming other living things; also called a consumer
(a)
Materials made up of decaying bits of plant and animal material
(a)
A series of steps in an ecosystem in which organisms transfer energy by eating and being eaten
(a)
Network of complex interactions formed by the feeding relationships among the various organisms in an ecosystem
(a)
Illustration of relative amounts of energy or matter contained within each trophic level in a given food chain or food web
(a)
Total amount of living tissue within a given trophic level
(a)
Process in which elements, chemical compounds, and other forms of matter are passed from one organism to another and from one part of the biosphere to another
(a)
Chemical substance that an organism needs to sustain life
(a)
Process of converting nitrogen compounds that plants can absorb and use
(a)
Process by which bacteria convert nitrates into nitrogen gas
(a)
Single essential nutrient that limits productivity in an ecosystem
(a)
Matter and energy are essential to life and seem to flow through trophic levels in a similar fashion. But energy flow is strictly a one-time, one-way stream. Matter flows through trophic levels and then flows through cycles that reuse, or recycle, nutrients within and between ecosystems.
True
False
Matter is recycled, it is often transformed, but it is never created or destroyed.
True
False
Scientific study of human populations
(a)
Change in the population from high birth and death rates to low birth and death rates
(a)
Number of individuals per unit area
(a)
Describes the way individuals are spaced out across their range
(a)
The number of males and females of each age in a population
(a)
Movement of individuals in an area occupied by an existing population
(a)
Movement of individuals out of an area
(a)
Growth pattern in which the individuals in a population reproduce at a constant rate
(a)
Growth pattern in which a population’s slows and then stops following a period of exponential growth
(a)
Largest number of individuals of a particular species that a particular environment can support
(a)
A population’s range can vary enormously in size, depending on the species.
True
False
Group of organisms of a single species that lives in a given area
(a)
Researchers study populations’ geographic range, density and distribution, _______ ______, and age structure.
(a)
Populations of different species often have very different densities, even in the same environment.
True
False
Distribution refers to how individuals in a population are spaced out across the range of the population which can be:
randomly
uniformly
mostly concentrated in clumps
all of these options
American bison, which are large grazing mammals, are most often found clumped in small groups. What might you infer about the spatial distribution of American bison?
What decreases the size of a population
immigration
emigration
Disease is an example of
density-dependent limiting factors
density-independent limiting factors
A massive tornado
density-dependent limiting factor
density-independent limiting factor
exponential growth curve
logistic growth curve
logistic growth curve
exponential growth curve
Which of the following is not an example of a density-dependent factor?
Parasitism
Natural Disasters
Predation
Competition
In a given area, if the population of predators increases, the population of prey will _____________.
increase
decrease
remain about the same
go extinct
Which factor would contribute to an exponential growth rate in a given population?
higher death rates
less competition
less resources
lower birth rates
All of the following are density-independent factors except:
seasonal changes
hurricanes
less space
deforestation
Ever since the Industrial Revolution, human population has generally:
increased
decreased
remained the same
ecology
A density-independent factor happens:
depending on the number of predators hunting prey
depending on the size of the population
if there are no resources left in a habitat
regardless of the size of the population
The range or area occupied by a population is its
growth rate
geographic distribution
age structure
population density
A biotic or abiotic resource in the environment that causes population size to decrease is a
growth factor
limiting factor
carrying capacity
limiting nutrient
Which of the following is not an example of a limiting factor?
primary productivity
limiting nutrient
exponential growth
disease
An example of a biogeochemical cycle is the ______ cycle.
water
nitrogen
carbon
All of these
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