WorksheetsFactors Affecting Populations
Total questions: 12
Worksheet time: 6mins
Members of the same species found in an ecosystem are called
Family
Niche
Community
Population
A population of elk existed for centuries in a hilly region of Tennesee. The landowners decided to introduce cows into the same area. Elk and cows eat some of the same kinds of plants. After the cowsp were introduced, the Elk population began to decline. How could the decline in the Elk population be explained?
Cows are at a higher trophic level than the Elk
The food web became too complex
The cows competed with the elk.
The elk were bigger than the cows.
The graph shows the number of squirrels in an ecosystem over a two-month period. Based on the graph, what inference can be made about the mealworm population?
Some squirrels are older than other squirrels
Squirrels hibernated during May
The squirrel population reached its carrying capacity in Decemeber
The population has carnivorous members
Squirrels eat a variety of plant material, including acorns from oak trees. During certain years, oak trees produce much greater numbers of acorns than usual. These highly productive years (Many acorns are produced) are called mast years. Which of the following is the most direct effect of a mast year on the squirrel population in an area?
The squirrel population increases
The squirrel population has fewer predators
The squirrel population decreases
The squirrel population expands its territory into new habitats.
Excess nitrogen fertilizers sometimes drain into waterways that flow into the Ohio. This nitrogen may cause algal blooms, which reduce dissolved oxygen in the water. How does nitrogen negatively affect the Ohio River?
Fish birth increase because of the extra dissolved oxygen
Fish population decrease because of of the lack of dissolved oxygen
Sediment on the bottom of the bay decreases
Runoff into the river increases
The graph shows how a groundhog recovered over a ten-year period after a population crash. Coyote in the same area feed primarily on groundhog. Which graph shows the most likely change in the coyote population for the same ten-year period?
A population of frogs that live in a river requires clear, fresh water to survive. A flood causes tons of sediment to be suspended in the river. Which of these most likely will happen to the frog population?
The frogs will adapt to life on land.
The frogs will move to another river
The frogs will adapt to living in muddy water
The frogs will decrease in number due to the water quality
Sea Lions swim across large expanses of the ocean while hunting for herring, their main source of food. The sea lions use sea ice as resting spots during their long swims. However, sea ice is rapidly melting as a result of global warming. Which statement describes what most likely will happen if global warming continues at its present rate?
Both sea lion and herring populations will increase
Sea lion population will increase, herring population will decrease
Sea lion population will decrease and herring population will increase
Sea lion populations will decrease and herring populations will stay the same
Brine shrimp have been living in the Great Salt Lake for 10,000 years. Over time, the lake has been slowly getting smaller. Which of the following is most likely to happen as a result of the lake shrinking?
There will be more brine shrimp because there will be more food for them.
There will be fewer brine shrimp because there will not be enough space
The lake will become saltier because of more brine shrimp
The lake will become less salty because less brine shrimp will grow
A disease causes the rabbit population to decline drastically. How would this decline in the rabbit population impact the community?
The fox population would decrease
The mouse population would decrease
The grasshopper population would decrease
the snake population would decrease
The picture below shows an ocean bay food chain. Sea otters move into the ocean bay. They eat all the carbs. This change will cause the
The sea urchin would have less food
The sea ducks would have more food
The artic foxes would have less food
More kelp would grow
What would most likely happen to the snakes and eagles if the frogs are removed?
The snakes will eat more eagles
There will be less grasshoppers and more grass
There will be less snakes and more eagles
There will be more grasshopper and less grass
