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WorksheetsEarth System, Biodiversity and Keystone Species Review
Total questions: 32
Worksheet time: 18mins
A population of yellow warblers, a type of songbird, experiences a period of exponential growth. Which of these factors would be a density dependent limiting factor that could decrease the carrying capacity of the ecosystem for this population of songbirds?
a competing species moves into the forest
a period of lower than normal rainfall
a developer fills in a wetland to build an office park
high winds knock down a quarter of the trees
A group of rodents is introduced on a remote island due to a shipwreck. Eventually, the population of rodents reaches the island’s carrying capacity. At this point, the birth and death rates are
relatively equal.
crashing.
increasing.
decreasing then increasing.
At what point would you expect to see the environment reach its carrying capacity?
A
B
C
D
A model should show:
how or why something works
what something looks like
every single detail of the system it represents
Something that goes into a system, a resource such as an environmental stimulus, money, a substance, energy, etc.
output
input
process
feedback
What is another word for abiotic?
Nonliving
Living
Breathing
Aerobic
Fire: biotic or abiotic?
Biotic
Abiotic
Which abiotic factor would be the main reason a polar bear not live in the desert?
Salt concentration
Temperature
pH
Light
Which would be a biotic factor for salmon in a river?
Water temperature
Bacteria in the water
Water pH
Water Salt Concentration
All of the student, faculty and staff at HS 1327 are considered what level of organization?
A population
A community
A biome
An ecosystem
The physical part of the ecosystem that meets the needs of an organism is called:
role
ecosystem
habitat
population
In a habitat, animals have a __________, which is how they interact, get food and shelter.
niche
ecosystem
community
population
A tick living on the body of a deer
predation
mutualism
commensalism
parasitism
A lion eating a zebra is an example of:
predation
mutualism
commensalism
parasitism
Competition occurs when organisms attempt to use the same resources
True
False
A bee eating the flower's nectar and picking up the flower's pollen
predation
mutualism
commensalism
parasitism
Which of the following factors is most likely to decrease the stability of an ecosystem?
An increase in animal biodiversity
An increase in plant biodiversity
the removal of one individual animal
the removal of one species
The LESS genetically diverse a population is, the better it can respond to environmental stressors
True
False
Complete the sentence:
One measure of species diversity is ______________. This is the number of different species in a particular area at a given time.
Species richness
Species evenness
Species diversity
What is a keystone species?
A species that helps to hold an ecosystem together
A species that lives in or around rocks
Keys and stones have nothing to do with ecology
A keystone isn't a living thing, it's just a stone
Why are some sharks considered a keystone species?
Because they are a top predator
They scare off smaller fish that may overgraze an area of sea grass
They are tertiary consumers
They are cartilaginous
