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WorksheetsSect 2.6-2.8 Symbiosis/Predation/Competition
Total questions: 25
Worksheet time: 15mins
_____ is the amount of energy lost as heat between trophic levels.
10%
25%
75%
90%
If a plant receives 10,000 calories from the sun, how much is left after it is eaten by an herbivore and a carnivore?
1 calorie
10 calories
100 calories
1000 calories
Which of the following are a major type of community interaction? (3)
biological pest control
predation
competition
symbiosis
_____ is an adaptation that helps an organism blend into its environment.
predation
competition
carrying capacity
camouflage
When you look like something you are not to protect yourself from predators it is called _____.
mimicry
grazing predation
true predation
natural selection
_____ increases or displays the ability of an organism to be successful in its environment and niche.
fitness
natural selection
coevolution
symbiosis
_____ are the organisms that are very important to the health and stability of an ecosystem.
predators
prey
coevolved species
keystone species
The different feeding positions in a food chain or food web are called _____.
producers
trophic levels
consumers
predators
_____ is using an introduced predator species to control the population of an introduced invasive species.
coevolution
keystone species
natural selection
biological pest control
When a species changes over a long period of time in response to changes in an organism they have a relationship with, it is called _____.
coevolution
bievolution
concurrent evolution
natural selection
_____ consists of dead leaves and other plant remains that accumulate on the ground.
detritus
biomass
detritivores
producers
What provides producers with the necessary nutrients to make organic compounds again?
the actions of consumers
sunlight
the actions of decomposers
the actions of hervivores
What type of organism will consume a producer? (3)
an herbivore
an omnivore
a consumer
a scavenger
In a graph plotting predator/prey populations over time, when prey numbers increase what happens to predator numbers over time?
they go in opposite directions
they go down
they stay the same
they go up
The predator prey relationship between a deer and the leaves it eats on a bush is called a/an _____. (2)
natural selection
herbivory
grazing predation
true predation
Interspecific competition often leads to _____ due to competition for resources. (4)
extinction
resource partitioning
evolution
natural selection
When the green Anolis and the brown Anolis lizards adapted over time to living on the ground and in trees, ____ was the result and _____ helped to make it happen. (2)
more competition for resources
less competition for resources
extinction
specialization
_____ is necessary for natural selection to occur within a species.
interspecific competition
intraspecific competition
competitive exclusion
specialization
Competition within a species is often for _____. (4)
water
sunlight
weather
food
resources
_____ is at work when two or more species compete for the same resources but one is more fit or better adapted for life in that ecosystem.
intraspecific competition
interspecific competition
competitive exclusion principle
a lack of natural selection
The symbiotic relationship involved in lichens is _____.
commensalism
parasitism
mutualism
competitive exclusion
Symbiotic relationships can be ______. (3)
random
neutral
negative
positive
The first trophic level is always occupied by _____.
omnivores
herbivores
producers
decomposers
_____ is the total amount of living material in a given area.
biomass
detritus
producers
consumers
Which of the following are a type of ecological pyramid? (3)
numbers
feeding relationships
biomass
energy
