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Decomposers are important in the food chain because they ___________.
 
break down dead organisms & recycle nutrients into the soil.
 
produce their own food using light from the sun.
 
stop the flow of energy from one organism to another.
 
are microscopic and other organisms can't consume them.
What do the arrows in a food chain show?
 
How many organisms are present
 
What eats what
 
The transfer of energy
What is likely to happen to the population of foxes if the population of rabbits decreases?
 
It will decrease.
 
It will increase.
 
It will stay the same.
What is likely to happen to the population of thrushes if the population of slugs increases?
 
It will increase.
 
It will decrease.
 
It will stay the same.
Which organism receives the least amount of energy from the producers?
 
Hawk
 
Rabbit
 
Grasshopper
 
Mouse
Energy from the plantain is transferred to the frog through which organsim?
 
grasshopper
 
butterfly
 
greenfly
 
ladybird
How many prey does the fox have?
 
3
 
2
 
1
 
4
An organism that eats only meat.
 
omnivore
 
carnivore
 
herbivore
 
decomposer
An organism that eats only meat.
 
carnivore
 
omnivore
 
herbivore
 
decomposer
An organism that eats only plants.
 
herbivore
 
omnivore
 
carnivore
 
decomposer
Which organism in the food web is an omnivore?
 
trout
 
snake
 
frogsalamander
An organism that must eat to obtain energy is known as _________.
 
Consumer
 
Producer
Plants are producers because they make their own food. What is the prcocess plants use to make their own food?
 
photosynthesis
 
transpiration
 
symbiosis
 
respiration
In a food web or food chain the arrow always points toward?
 
The eater (predator)
 
The eaten (prey)
Organism that is hunted and killed for food and nutrients
 
Prey
 
Predator
 
Decomposer
 
Producer
Ostriches and gazelles eat next to each other. They both watch out for danger.
 
Mutualism
 
Predator-Prey
 
Commensalism
 
Parasitism
Hermit carbs live in snail shells that the snail has left behind. The crab gets a home and the snail is unaffected.
 
Commensalism
 
Predator-Prey
 
Mutualism
 
Parasitism
The bacteria in our large intestine break down food that we consider waste. During this process, vitamins are released that we absorb into our bloodstream. This is an example of which symbiotic relationship?
 
Parasitism
 
Commensalism
 
Mutualism
 
Predator-Prey
Cattle egrets forage (feed) in fields among cattle. The egret gets easy access to flying insects stirred up by the cattle, and the cattle don't care if they are there or not.
 
Commensalism
 
Predator-Prey
 
Mutualism
 
Parasitism
An organism that causes ecological or economic harm in a new environment where it is not native.
 
Invasive Species
 
Endangered Species
 
Threatened Species
 
Extinct Species
The harmed species in a parasitic relationship is called:
 
host
 
parasite
 
consumer
 
decomposer
Which of the following in NOT an example of a symbiotic relationship?
 
A mother bear caring for her cub.
 
A tapeworm living in a cow's intestines.
 
Bees eating nectar and pollinating flowers
 
A bird building a nest in a tree.
A relationship between two organisms where one is helped and the other is unaffected.
 
commensalism
 
parasitism
 
mutualism
 
competition
A relationship between two organisms where both organisms benefit.
 
mutualism
 
commensalism
 
parasitism
 
competition
A relationship between two organisms where one is helped and the other is harmed.
 
parasitism
 
commensalism
 
mutualism
 
competition


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