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WorksheetsDMS Ecology Review Updated
Total questions: 59
Worksheet time: 36mins
Which of the following statements account for the change in population seen between years 7 and 8?
The birth rate of the pigeons increased.
The emigration rate of the pigeons decreased.
The death rate of the pigeons exceeded the birth rate.
The neighborhood reached its carrying capacity for the pigeon population
A new species of snake was introduced to a tropical region. Scientists then noticed a steady decline in the presence of field mice and an increase in the number of snakes. Which of these is the most likely explanation about why the population size of each animal changed?
The snakes introduced to the region dominated the habitat, forcing the mice to find another place to live.
The mice became prey to the introduced snakes, allowing the snake population to increase but decreasing the mice population.
The snakes introduced to the region competed with the mice for food, allowing the snake population to increase but decreasing the mice population.
The people in the surrounding area set traps that killed the mice, allowing the snakes to live without any predators and therefore to increase in number.
Scientists found, that over a period of 200 years, a mountain pond was transformed into a meadow. During that time, several communities of organisms were replaced by different communities. Which of these best explains why new communities were able to replace older communities?
The original species became extinct.
Species in the older community died from old age.
The abiotic characteristics of the habitat changed.
Diseases that killed the older organisms disappeared.
Ecologists study different levels of organization within the biosphere. Identify which level corresponds to a group of individuals that belong to the same species and live in the same area.
A: Community
B. Biome
C. Ecosystem
D. Population
Each step in a food chain is called a trophic level. What percentage of energy available at one trophic level is transferred to organisms at the next level?
about 2 percent
about 10 percent
about 25 percent
about 50 percent
What type of relationship is this?
parasitism
mutualism
commensalism
competition
symbiotic relationship in which both organisms benefit
competition
mutualism
predation
commensalism
symbiotic relationship in which one organisms benefits and the other organism is not affected
competition
mutualism
parasitism
commensalism
Which of these organisms is the secondary consumer?
Owl
Mouse
Grass
Grasshopper
What do omnivores eat?
Animals
Plants and Animals
Plants
Dead Animals
Place the levels of environment in the correct order.
biome, biosphere, population, organism, ecosystem,community
organism, ecosystem, biosphere, population, community, biome
organism, population, community, ecosystem, biome, biosphere
population, community, organism, biome, ecosystem, biosphere
What is the highest trophic level of the hawk in the food web?
Producer
Primary consumer
Secondary consumer
Tertiary consumer
Which of these is an autotroph?
Consumer
Producer
Decomposer
What was NOT a part of the water cycle?
Condensation
Precipitation
Decompostition
Evaporation
symbiotic relationship in which both organisms benefit
competition
mutualism
predation
commensalism
Rabbits introduced into Australia over 100 years ago have become a serious pest to farmers. Rabbit populations increases so much that they displaced many native species of plant eaters. What is the most logical explanation for their increased numbers?
Rabbits have a high death rate.
There are few effective predators.
Additional rabbit species have been introduced.
There is an increase in rabbit competitors.
Barnacles are animals that cannot move. In order to get food, they attach to whales and catch any floating plankton in the water. The whale is neither helped nor harmed in the interaction. What type of symbiosis is this?
Mutualism
Commensalism
Parasitism
Neutralism
Which of the following is classified as a regulator?
polar bears
lizards
fish
bacteria
Which of the following is classified as a conformer?
lizards
humans
dogs
cats
A population of moths that develop colors to give them better camouflage would be an example of
acclimation
adaptation
A human that lives in the hot state of Texas adjusts to living in Alaska. This would be an example of..
adaptation
acclimation
DDT is NOT
damaging to food chains
the best pesticide EVER
known to cause human disease
the cause of weakened bird egg shells
Although DDT use has been banned in the US, it is still present in our ecosystems.
true
false
Chemosynthetic organisms use the sun to make food.
true
false
Which of these is not a greenhouse gas?
water vapor
hydrogen
methane
carbon dioxide
MOXIE can change oxygen to carbon dioxide.
True
False
Is New York City likely to be an urban heat island?
yes
no
Winds and currents are caused by...
magicians
uneven heating of land and water surfaces
just pure coincidence
the weather reporter
A koala bear only eats Eucalyptus leaves, so it must be...
a conformer
a regulator
a generalist
a specialist
In a marine energy pyramid, algae would be found on the bottom level.
true
false
Which of the following would probably not be part of the niche of an earthworm?
loosening soil
providing food for sharks
providing food for birds
decomposing dead matter
Which climate zone experiences seasons?
arctic
polar
temperate
tropical
What is typical number of trophic levels in most food chains?
1-2
3-4
5-6
7-8
Ozone is made up of 3 atoms of carbon.
true
false
Chlorofluorocarbons (CFCs) are believed to destroy...
greenhouse gases
ozone
winds and currents
