Worksheets8.11A Competition
Total questions: 17
Worksheet time: 9mins
What is the main source of energy in an energy pyramid?
Sunlight
Water
Wind
Coal
Which trophic level is always at the base of an energy pyramid?
Primary Consumer
Secondary Consumer
Producer
Tertiary Consumer
Which organism is at the highest trophic level?
Producer
Primary Consumer
Secondary Consumer
Tertiary Consumer
What is the role of decomposers in the energy pyramid?
Produce energy
Consume energy
Break down dead organisms
Photosynthesis
Which organism is at the highest trophic level?
Producer
Primary Consumer
Secondary Consumer
Tertiary Consumer
What is the role of decomposers in the energy pyramid?
Produce energy
Consume energy
Break down dead organisms
Photosynthesis
According to this food web, which organisms would the bobcat and snake compete for if the mouse population and swamp rabbit population decreased?
Raccoon and sparrow
Raccoon and Eastern cottontail rabbit
Sparrow and seeds
Sparrow and cottontail rabbit
Wild hogs introduced to Texas from Europe became feral after the hogs escaped from the ranches where they lived. Feral hogs are omnivores that feed on native plants, crops, and small animals. Feral hogs can damage an ecosystem by rooting through the soil to look for food and trampling small plants.
Which types of native organisms do feral hogs most likely compete with for food sources?
Carnivores and producers
Herbivores and carnivores
Producers and decomposers
Decomposers and herbivores
Sea anemones and clown fish live together in the ocean. Which statement best describes one way sea anemones depend on clown fish for an abiotic factor in an ecosystem?
Clown fish protect sea anemones from predatory fish.
Clown fish decrease competition among sea anemones.
Clown fish consume the remains of organisms paralyzed by sea anemones.
Clown fish move water near sea anemones when dissolved oxygen levels are low.
Which statement best explains a difference between Plant 1 and Plant 2?
Plant 1 obtains more water from the soil because of its root surface area and root depth.
Plant 1 obtains more sunlight because of its root surface area and root depth.
Plant 2 obtains more water from the soil because of its root surface area and root depth.
Plant 2 obtains more sunlight because of its root surface area and root depth.
Which statement best describes the energy flow through this pyramid?
Energy is transferred down each level of the energy pyramid.
The energy lost at each level is consumed by organisms in the top level.
Energy is transferred from organisms in one level to those in the level above.
The organisms in the bottom level directly provide energy to organisms in all the other levels.
By sprouting in the rain-forest canopy, the strangler fig seedling is exposed to more —
Sunlight
Soil
Nutrients
Consumers
Giant salvinia is an aquatic plant that floats on water and reproduces rapidly. When these plants die, decomposition by bacteria affects oxygen levels in the water. As more plants die,
less oxygen is available in the water. Students observe a pond covered by giant salvinia.
Which statement is the best prediction the students can make about the immediate future of the pond?
The depth of the water in the pond will increase.
Fish populations in the pond will begin to decrease
The amount of bacteria in the pond will suddenly decrease.
The number of different types of plants around the pond will increase.
Which statement best describes the flow of energy through this
pyramid?
The trophic level represented by catfish and gobies receives energy directly from the producers.
The trophic level represented by shrimp and copepods receives energy directly from the tertiary consumers.
The trophic level represented by redfish and flounder receives energy directly from the secondary consumers.
The trophic level represented by wire grass and phytoplankton receives energy directly from the primary consumers.
The populations of which organisms will most likely increase as a result of a disease that suddenly reduced the population of Texas horned lizards?
Grasses and ants
Ants and grasshoppers
Grasshoppers and Texas cottonmouths
Texas cottonmouths and red-shouldered hawks
Which ecosystem would most likely survive if a disease killed the grasses.
The forest ecosystem, because most of the animals can eat other organisms.
The grassland ecosystem, because several predators compete for food.
The forest ecosystem, because it has three top predators.
The grassland ecosystem, because it has many herbivores.
Immediately after a forest fire, the primary consumers in the area will compete most for which biotic factor?
Food
Space
Oxygen
Sunlight
