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WorksheetsInteractions and Relationships in Ecosystems
Total questions: 30
Worksheet time: 54mins
Humman birds and flowers have a mutualistic relationship. What would happen to the population of flowers as the population of humming birds increased?
Flower population would increase
Flower population would decrease
Flower population stays the same
Flower population goes extinct
Tapeworms and dogs have a parasitic relationship. The tapeworm lives in the intestine of the dog and absorbs nutrients from the food the dog eats. Describe the outcome of this relationship...
The tapeworm and dog help each other survive.
The tapeworm and dog are BOTH healthy.
The dog becomes ill, and the tapeworm benefits.
The dog and tapeworm BOTH become ill.
What is symbiosis mean?
Two species living together in a specific area who have a relationship.
Two species living together in an area that do no interact.
Two species who benefit from their interactions.
Two species who are harmed by their interactions.
Clownfish live in and around sea anemones. They have a mutualistic relationship. Which of the following observations best supports the claim that this relationship is beneficial to the sea anemones?
When the clownfish are removed from the sea anemones their (the clownfish) population declines.
The sea anemone has stinging tentacles that are used against predators.
42 Wallaby Way, Sydney
The clownfish eat the algae that accumulates on the sea anemone, and chases away butterfly fish.
Which of the following describes a competitive relationship?
Owl and field mouse
Oak tree and pine tree
Spider and fly
Shark and Remora fish
How do commensalistic and mutualistic relationships differ?
In a commensalistic relationship one organism benefits while the other one is unaffected, while in a mutualistic relationship one organism benefits while the other is harmed.
In a commensalistic relationship one organism benefits while the other one is unaffected, while in a mutualistic relationship both organisms benefit.
In a commensalistic relationship one organism benefits while the other one is harmed, while in a mutualistic relationship both organisms benefit.
In a commensalistic relationship one organism benefits while the other one is harmed, while in a mutualistic relationship one organism benefits while the other one is unaffected.
A marine food web is provided below (energy travels from the prey to the predator). Describe the relationship between the lantern fish and the sunfish. Is it symbiotic, predatory, or competitive? Explain your answer.
Symbiotic, they live on the same tier.
Predatory, sunfish eat lantern fish.
Competitive, both fish eat copepods.
Parasitic, sunfish are parasites that live in lantern fish.
Ten tomato plants are grown in one small pot with limited amounts of soil (space and nutrients).
This is an example of:
Mutualism
Commensalism
Parasitism
Competition
Predation
Which of the following best describes a predatory interaction in an ecosystem?
Cooperation between two species
Competition for resources among species
One organism hunting and consuming another organism
Mutual exchange of benefits between organisms
To reduce erosion in an area, an exotic fast-growing vine is introduced into the area without
any growth control. How will the new plant most likely affect the ecosystem?
This graph demonstrates:
there is no relationship between predator and prey populations.
changes in the predator population depend on changes in the prey population.
Predator and prey populations are constantly increasing.
changes in the prey population depend on changes in the predator population.
What does "niche" mean in an ecological context?
The physical space occupied by an organism
The role of an organism in its ecosystem, including its interactions with biotic and abiotic factors
A type of consumer that only eats plants
The migration pattern of a species
Which of the following is NOT a symbiotic relationship?
Competition
Commensalism
Mutualism
Parasitism
In Africa, as the crocodile lies with its mouth open, the plover, or crocodile bird, flies into its mouth and feeds on bits of meat stuck in the crocodile’s teeth. The crocodile does not harm the plover. The plover gets a meal and the crocodile gets his teeth cleaned. What conclusions might be drawn regarding the dynamics of this relationship?
It is a mutualistic relationship because both animals benefit; neither animal is harmed.
It is a symbiotic relationship because the plover benefits from the meat in the crocodile's teeth..
The crocodile is a predator. The plover is a parasite. There are two relationships illustrated by this dynamic.
It is an example of commensalism because the plover benefits from the relationship while the crocodile is neither helped or harmed.
Overall, all the interactions between organisms in ecosystems...
Keep ecosystems & populations unstable and random
Keep ecosystems & populations stable and balanced
Parasites and predators help maintain ecosystem stability because...
They increase the population of all organisms so ecosystems become diverse
They decrease the population of certain organisms to ensure no species overpopulates
They increase the survival of all species
Any of the above are possible
How does competition between organisms maintain ecosystem stability and biodiversity?
The winners of the competition increase in population size and dominate the ecosystem
Both organism populations become stronger and larger as a result of the competition
The population sizes are kept in check due to limited resources
All of the above are true
Which of the following best describes an ecosystem?
A place with many different species of animals
The climate conditions of an environment
All the biotic factors in an area
A place where biotic and abiotic things interact with each other
