WorksheetsEcology
Total questions: 20
Worksheet time: 10mins
This graph represents what?
boom or bust
exponential growth
logistic growth
The following graph is an example of.....
logistic growth
exponential growth
boom or bust
The following graph shows.....
logistic growth
exponential growth
boom or bust
As the graph reaches line K, what is happening to the population?
The population reaches its carrying capacity
The population will drop almost to 0 once it reaches line K
The population will eventually pass line K
The carrying capacity for a population is......
dependent only on predators
same for each organism
not effected by limiting factors
the number of people, other living organisms, or crops that a region can support without environmental degradation.
Limiting factors cause....
populations to increase
caps a population size at a certain point
allows populations to grow exponentially
A volcano in Hawaii erupts and completely decimates a nearby ecosystem covering everything in liquid hot magma. After the magma cools how would you expect life to come back the the ecosystem?
grasses -> small trees -> flowers -> shrubs -> large trees
mosses -> wild flowers -> grasses -> shrubs -> large trees
grass -> wild flowers -> shrubs -> small trees -> large trees
lichens/mosses -> grasses -> shrubs -> small trees -> large trees
What picture depicts what type of succession?
Secondary
Primary
Not enough information given
Tertiary
The island of Surtsey came up from the ocean in the 1960's. According to what you have learned about succession, what would you expect the pioneer species to be on this new island?
wild flowers
annual grasses
lichen
any kind of plants that have roots
A density dependent factor is....
where the effect on a population will always be the same no matter the population size
where a population has reached its limit for the number of individuals the ecosystem can uphold
where allele frequencies will always remain the same
where the the effect something has on a population will be due to how many organisms are in the population
A density independent factor is....
where allele frequencies will always remain constant
where the effect on a population will always be the same no matter the population size
where the the effect something has on a population will be due to how many organisms are in the population
where a population has reached its limit for the number of individuals the ecosystem can sustain
An example of a density independent factor would be.....
temperature of a lake
parasites that harm fish
the amount of algae available for primary comsumers
bigger predators in the lake that eat the primary consumers
An example of a density dependent factor would be....
the speed of the current in a river
going through a drought
competition for food
how much rainfall an ecosystem gets per year
Barnacles that grow on the bottom of a whale without harming it or giving it any real advantage would be an example of.....
mutualism
predation
parasitism
commensalism
The picture depicts which symbiotic relationship?
mutualism
parasitism
predation
commensalism
When energy moves between trophic levels in an ecosystem energy is lost as?
heat
oxygen
carbon dioxide
N2
When energy moves between trophic levels in an ecosystem what percentage of energy is lost due to heat?
10%
50%
90%
20%
How do animals contribute to the amount of atmospheric carbon?
not at all
photosynthesis
respiration
What type of nitrogen is usable for plants?
Ammonia
Nitrates
Nitrites
Atmospheric Nitrogen gas
What is the tertiary consumer in this picture?
caterpiller
frog
owl
snake
