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Worksheetsecological relationships review
Total questions: 16
Worksheet time: 14mins
Clownfish are tiny, omnivorous fish that find shelter from predators in the poisonous tentacles of sea anemones. The sea anemones sting their prey to capture food, but the clownfish are not hurt by the stinging tentacles. The clownfish clean the tentacles of the sea anemone and scare off butterfly fish, which consume sea anemones.
competitive
harmful
predatory
beneficial
What is the function of decomposers in this meadow environment ?
Synthesis of organic molecules from inorganic raw materials
Splitting of water into hydrogen and oxygen
Conversion of light energy into chemical energy
Recycling of nutrients from dead organisms back into the soil
Bears and wolves eat deer, boar, sheep, and and other livestock. If the bear population in an ecosystem decreases, what would be the effect on the deer population?
The population would decrease, as the parasitism created for protection against wolves is a limiting factor.
The population would increase, as competition for the same food is a limiting factor.
The population would increase, as predation by bears is a limiting factor.
he population would decrease, as shelters created by bears' caves is a limiting factor.
Read the passage "Gopher Tortoise" in the box below.
The gopher tortoise is a native reptile of
Florida and is very important to the ecosystem. The gopher tortoise digs underground burrows that are used by over 300 other species of animals. Some of these animals share these burrows on a regular basis, while others only
take shelter in them when a wildfire burns through pine forest. The tortoise receives no benefit from these other animals invading its burrows, but can do very little to force them to leave.
What relationships exists between the gopher tortoise and the burrow inhabitants?
commensalism
competition
mutualism
parasitism
The images below show a tapeworm with a ring of hooks around its head. This ring of hooks allows the tapeworm to stay anchored in its host's small intestines. As food passes from the stomach to the small intestines of the host, the tapeworm absorbs the nutrients through its skin, slowly starving the host.
What type of relationship exists between the host and the tapeworm?
commensalism
mutualism
parasitism
predation
Bees feed on nectar in flowers. To reach the nectar, a bee must fly deep inside the
flower. Inside the flower are pollen grains that are produced by the flower's male
reproductive organs. The pollen sticks to the furry parts of the bee's body, and the bee
transports the pollen as it visits other flowers, allowing the other flowers to be fertilized.
Which of these relationships best describes the interaction between the bee and the
flower?
predation
parasitism
commensalism
mutualism
The graph shown represents a predator-prey relationship. What is the most probable reason for the increasing predator population from day 5 to day 6?
A predator population equal in size to the prey population from day 5 to day 6
An increasing food supply from day 5 to day 6
The extinction of the yeast on day 3 and day 10
The decreasing prey population from day 1 to day 2
In his studies of birds in the Galapagos Islands, Charles Darwin observed that a few bird varieties with similar beak size and shape inhabited a particular area.What limit the numbers of similar varieties?
Competition for specific concentration of oxygen in the atmosphere
The presence of an excessive number of autotrophs
he presence of a disease that attacks birds with similar beaks
Competition for the same type of food
The diagram shown represents some of the food relationships between several organisms in a marine community. Which organisms would normally be the least numerous in this marine community?
Orca whales
Small fish
Diatoms
Small crustaceans
The table shows several organisms and their food sources.
Which organism in the table receives the smallest percentage of energy transfer?
tree
beaver
wolf
moose
The picture shows a forest in Atlanta, Georgia, overgrown with Kudzu, an invasive species of plant native to Japan that was introduced to the United States about 150 years ago.
Based on the picture, what will most likely happen to the plants that grow below the Kudzu?
They will decrease in number because the lack of sunlight limits their ability to photosynthesize.
They will disperse seeds to a new location where they have less competition for vital resources.
They will immediately all form defenses against the kudzu so that it does not take over.
They will increase in number because the kudzu provides an additional food source for them.
Algae grows on the backs of spider crabs. This allows spider crabs to blend in with the ocean floor and provides the algae a place to live. The algae and the spider crab have what type of relationship?
Parasitism
Competition
Mutualism
Commensalism
The image shows a food web in a Florida ecosystem, with arrows pointing to the consumer. A new organism moves into the ecosystem. Its major food source is the pine borer.
Which animals in the food web will form a competitive relationship with the new organism?
squirrel and salamander
kinglet and fox
fox and hawk
salamander and kinglet
Read the passage above then answer this question:
If the human population increases, what will happen to the northern spotted owl population?
It will increase as humans will form a mutualistic relationship with the northern spotted owls.
It will decrease as humans will compete for the same food sources used by the northern spotted owls.
It will increase as humans will make newer forests with more open space for the northern spotted owls.
It will decrease as humans will cut down the old-growth forests that are used for nesting sites by the northern spotted owls.
The graph shows the populations of two species from January 2010 to June 2011. One species is native to the ecosystem, while the other is a new species that was recently introduced into the ecosystem.
Which interaction between the two species would explain the trends in the size of their populations?
The two species form a mutualistic relationship.
The new species is a host and the native species is its parasite.
The two species form a competitive relationship.
The new species is a prey and the native species is its predator.
Honeybees are important pollinators of flowers. Mites that live in the bodies of bees can attack honeybee colonies. Some birds, amphibians, and insects eat honeybees. Which of the following relationships is not included in the description above?
parasitism
mutualism
commensalism
predator-prey
