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WorksheetsChanges in populations
Total questions: 18
Worksheet time: 12mins
A Coyote eats a rabbit. The rabbit has eaten grass. Select how the flow of energy would look.
Grass ---> Rabbit---> Coyote
Rabbit<---- Grass<---- Coyote
Coyote-----> Rabbit----> Grass
Coyote<---- Rabbit-----> Grass
Populations can change over time. For instance, if weather and climate conditions for oak trees to produce more acorns than usual then the squirrel population will _______________.
increase
decrease
stay the same
go extinct
If the squirrel population increases then animals that are predators of squirrels, such as owls and foxes, will ___________________.
increase
decrease
stay the same
go extinct
A ______________________ is anything that constrains a population's size and slows or stops it from growing.
natural disaster
population control
restraining effect
limiting factor
The clownfish is protected by the sea anemone from predators, while the clownfish lures in food for the sea anemone. What type of symbiotic relationship?
Mutualism
Parasitism
Commensalism
Competition
The relationship between Cheetahs and zebras in Africa depicts the predator-prey relationship. Since the zebras are a main prey of the cheetah, researchers have realized a food shortage as the cheetahs are eating too many zebras. This keeps the cheetah population in check. How does this relationship affect this populations?
The relationship controls the population size of both species
The predator or prey will become extinct
The predator and prey are in competition with each other
The predator species will grow out of control.
What is an example of an abiotic factor? Check all that apply
Temperature
Animals
Precipitation
Plants
What is the number of different species of plants and animals in an area
Biodiversity
Conservation
Population
Community
Which statement BEST describes how limiting factors affect the organisms in an ecosystem?
They destroy resources organisms need to survive.
They provide what an organism needs to survive.
They keep a population from getting too large.
They have no effect on the organisms in an ecosystem.
A disease kills most members of a predator population. What is the MOST LIKELY effect on the prey population?
It will also be killed by the disease.
It will decrease in size.
It will greatly increase in size.
It will not be affected by the change in the predator population.
Limiting factors can only be abiotic factors.
True
False
A fox eats a squirrel. The population of squirrels has...
increased.
decreased.
stayed the same.
2 foxes enter an ecosystem that has a lot of rabbits. Foxes eat rabbits. It is likely that the population of foxes will...
increase.
decrease.
stay the same.
2 foxes enter an ecosystem that has a lot of rabbits. Foxes eat rabbits. It is likely that the population of rabbits will...
increase.
decrease.
stay the same.
Hunters in an ecosystem really like to hunt deer. They are hunting too much and damaging the ecosystem. What are some reasonable effects of their overexploitation through hunting deer? Check all that apply
The population of mountain lions, who eat deer, will decrease
The grass, which deer eat, will die out
Humans will go extinct
The population of deer will decrease
Rabbits, who also eat grass, will increase in population
In an ecosystem, rabbits eat grass, and coyotes eat rabbits. All living things also need water, shelter, and mates to survive. Which of these situations will cause an increase in the population of rabbits?
The water becomes polluted
Deer, which also eat grass, enter the ecosystem
An increase in rain causes more grass to grow
The coyote population increases
In the following graph, the predator and prey populations change over time. What is the reason for the predator population decreasing?
The predator eats the prey
The prey is eaten by the predator
The predator runs out of food when the prey population is low
The prey survives longer when the predator population is low
In the following graph, the predator and prey populations change over time. What is the reason for the prey population increasing?
The predator eats the prey
The prey is eaten by the predator
The predator runs out of food when the prey population is low
The prey survives longer when the predator population is low
