WorksheetsEcology Review
Total questions: 30
Worksheet time: 15mins
Name
Class
Date
1.
A tick sucks blood from a dog. The tick grows from its relationship with the host, but the dog is harmed from the loss of blood. This is an example of:
a)
Mutualism
b)
Commensalism
c)
Predation
d)
Parasitism
2.
Organisms that use energy from the sun to make their own food are called ____________.
a)
herbivores
b)
heterotrophs
c)
producers
d)
primary consumers
3.
The _________________ of a species in an environment is the population size that the environment can sustain, given the food, habitat, water and other necessities available in the environment.
a)
Limiting factor
b)
Carrying capacity
c)
death rate
d)
immigration
4.
_________________ is the capacity of the soil or rock to allow fluids to pass through it.
a)
Permeability
b)
Saturation
c)
Composition
d)
Humus
5.
If a primary food source was removed from a food web, what would happen to the population size of the organisms in the level above the food source?
a)
They would increase
b)
They would decrease
c)
They would stay the same
6.
Organisms introduced into a new area that out compete the species that currently live there are called _____________________.
a)
native species
b)
invasive species
c)
non-indigenous species
7.
The best soil for plant growth is ___________.
a)
clay
b)
silt
c)
sand
d)
loam
8.
________________ is a symbiotic relationship in which both species benefit.
a)
Mutualism
b)
Commensalism
c)
Parasitism
d)
Predation
9.
As a population grows larger than its environment can support, the ______________ may rise. This is because there are not enough resources to support the larger population.
a)
birth rate
b)
death rate
c)
immigration
10.
Only 10 percent of the _____________ available within one trophic level is passed to the next higher level in an ecosystem. This is why it takes so much more of the lower level to feed the upper levels.
a)
energy
b)
food
c)
population
11.
Soil ________________ is the combination of all the materials found in the soil which affects the type of plants that grow or animals live in it.The basic components of soil are minerals, organic matter, water and air.
a)
permeability
b)
saturation
c)
texture
d)
composition
12.
When the oil runs into the river, the animals that drink the water can become __________.
a)
psychopathic
b)
sick
c)
unicorns
13.
In order to be invasive, a species must be introduced,have no natural predators or competitors, reproduce rapidly, and _________ the native species.
a)
benefit
b)
harm
14.
_______________is a relationship where one organism is helped and the other is not affected.
a)
mutualism
b)
commensalism
c)
parasitism
d)
predation
15.
The food web would completely collapse without _____________ to start the base of the food chains. Without plants, nutrients and oxygen would be in short supply.
a)
consumers
b)
omnivores
c)
producers
16.
When a species is introduced into a new ecosystem, the balances that kept the species in check in its native ecosystem, generally ____________, are rarely introduced with it. This can lead to uncontrolled growth of the non-native species, which is disruptive to the new ecosystem.
a)
mates
b)
prey
c)
predators
d)
offspring
17.
A ____________ is the largest category used to classify ecosystems. On land, the earth is divided into several and their classification is based on average annual temperature and precipitation.
a)
community
b)
ecosystem
c)
biome
d)
biosphere
18.
A combination of decreased birthrate and _____________ will cause a decrease in a population.
a)
death rate
b)
immigration
c)
emigration
19.
The natural environment where a species lives is called its ________.
a)
niche
b)
habitat
c)
ecosystem
d)
biome
20.
An ____________ consists of all of the biotic and abiotic factors in an area.
a)
community
b)
ecosystem
c)
biome
d)
biosphere
21.
A lion would be considered a ___________ of a gazelle.
a)
host
b)
prey
c)
enemy
d)
predator
22.
Snakes and rodents comprise a predator-prey relationship in an ecosystem. If you remove the predator, the prey population will logically __________.
a)
increase
b)
decrease
c)
remain the same
23.
Properties tell what soil is like. Soil can be crumbly or smooth, dark or light. How much water a soil holds is determined by texture and that is determined by the ____________________.
a)
saturation point
b)
maximum permeability
c)
coloration
d)
size of particles
24.
This food chain shows the organisms in a ______________, which is a group of different populations of different species.
a)
community
b)
ecosystem
c)
biome
d)
biosphere
25.
A ________is the largest natural population of organisms that can potentially interbreed to produce fertile offspring.
a)
species
b)
population
c)
community
d)
ecosystem
26.
_____________ consume or eat their food.
a)
producers
b)
autotrophs
c)
consumers
27.
Any abiotic or biotic factor in an ecosystem that causes a population’s size to slow or decrease is a ________________________.
a)
carrying capacity
b)
birth rate
c)
death rate
d)
limiting factor
28.
A good method to seperate soil by its particle size would be _______________.
a)
evaporation
b)
sifting
c)
magnetism
d)
diffusing
29.
_____________ is the movement of new individuals into an existing population. This is just like social studies and the people that come to the USA from foreign lands.
a)
immigration
b)
emigration
30.
Webs contain several _____________ and, therefore, are much more complex than food chains.
a)
species
b)
populations
c)
food chains
d)
biotic factors
100 %
