The diagram below shows the feeding relationships between populations of organisms in an area. The arrows point from the organisms being eaten to the organisms that eat them.
Using only the the relationships between the organisms shown in the diagram, if most of the butterflies are killed, which of the following statements describes what will happen to the number of lizards and why? (SC.7.L.17.1)
The number of lizards will increase because there are fewer butterflies to eat them.
The number of lizards will decrease because there are not enough butterflies for them to eat.
The number of lizards will stay the same because the butterflies are not eaten by the lizard.
The number of lizards will stay the same because a change in the population of butterflies will not affect any other population of organisms.
Which organisms in the food web
shown above compete for the same food source? (SC.7.L.17.2)
longnose snake and Sagebrush lizard
Golden-mandtled squirrel and Pronghorn
Mountain Lion and Coyote
badger and bacteria
Which pair of terms could apply to the same organism? (SC.7.L.17.1)
Producers and omnivores
Decomposers and herbivores
Consumer and carnivore
carnivore and producer
All organisms take energy from their environment. Every organism needs this energy in order to grow and reproduce. How do producers get energy? (SC.7.L.17.1)
They obtain energy by eating plants, bacteria, and algae.
They extract chemical energy from decaying organic matter.
They capture energy from sunlight and make their own food.
They extract energy from the chemicals in soil, air, and water.
According to the food web above, which organism is a producer in this ecosystem? (SC.7.L.17.1)
Snakes and frogs
Mice and rabbits
Berries and Plantains
Grasshoppers and Greenflies
Fungi, which break down dead organisms, are _____________. (SC.7.L.17.1)
First-level primary consumers
Decomposers
Producers
Herbivores
Remoras are small fish that attach to sharks but do not harm them. When sharks tear prey apart, remoras eat the leftovers and the sharks don’t receive any benefit. What relationship do remoras have with sharks? (SC.7.L.17.2)
Mutualism
predation
parasitism
commensalism
An orgamism that gets energy from the sun to make its own food is a _____________. (SC.7.L.17.1)
producer
consumer
parasite with host
detritivore
An organism that gets energy by eating other organisms is a _________________. (SC.7.L.17.1)
producer
consumer
parasite with host
ecosystem
The place in an ecosystem where an organism lives is called ____________________. (SC.7.L.17.2)
population
community
habitat
niche
The organisms living in an area and the nonliving features of that environment form __________. (SC.7.L.17.1)
an ecosystem
competition
a symbiotic relationship
its limitiing factor
All the tortoises living in a specific region of a desert ecosystem make up what? (SC.7.L.17.1)
a bioshere
a carying capacity
a food chain
a population
The largest number of organisms from a particular species that can live in an ecosystem at one time is the __________ for that species in that ecosystem. (SC.7.L.17.2)
symbiosis
carrying capacity
commensalism
sample count
Which of these organisms is a producer? (SC.7.L.17.1)
a snail
a bobcat
grass
butterfly
Your sick puppy is diagnosed with roundworms. What type of symbiotic relationship do the puppy and the roundworms have? (SC.7.L.17.3)
mutualism
commensalism
parasitism
cooperative
Compared to a carnivore, what advantage does an omnivore have? (SC.7.L.17.2)
An omnivore is also able to consume only plants.
An omnivore is generally faster.
There is no advantage.
An omnivore is able to consume both plants and animals.
This figure is an example of which type of interaction in an ecosystem? (SC.7.L.17.3)
competition
food chain
food web
mutualism
What causes competition? (SC.7.L.17.1)
need for status within the group
limited supply of essential resources
prospect of winning
over abundance of essential supplies
Mushrooms, bacteria and worms are excellent decomposers putting essential elements back into the soil. What is another name for this category of organisms? (SC.7.L.17.3)
consumers
producers
autotrophs
detritivores
From the chart, which type of move did the largest population make? (SC.7.L.17.2)