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Ecosystem Interactions Chapter 2
Test Description: Environmental levels, food chains, food webs, energy pyramid, competition, predation, symbiosis
Instructions: Answer all questions to get your test result.
1) A tick sucks blood from a dog. In this relationship, the tick is the ______ and the dog is the _____.
A
predator, host
B
host, parasite
C
parasite, host
D
parasite, prey
2) Blue-green algae are organisms that convert sunlight into food through photosynthesis. What is the role of blue green algae in a food chain?
A
decomposer
B
producer
C
scavenger
D
consumer
3) A polar bear hunts a seal. After the polar bear is done feeding, an Arctic fox consumes the remaining meat. Which describes the role of the Arctic fox in this situation?
A
decomposer
B
producer
C
scavenger
D
predator
4) Spiders eat centipedes. Lizards eat centipedes. Hawks eat snakes. Snakes eat lizards. How many arrowspoint away from the centipede?
A
three
B
two
C
none
D
one
5) Organisms that can make their own food from sunlight are called
A
producers
B
decomposers
C
carnivores
D
consumers
6) Grass is eaten by a prairie dog. The prairie dog is eaten by a coyote. This is an example of
A
a food chain
B
an abiotic element
C
an omnivore
D
a herbivore
7) One food web arrow goes from a prairie dog to a coyote, showing that
A
the coyote eats the prairie dog
B
the prairie dog is a producer
C
the prairie dog eats the coyote
D
the coyote is bigger
8) Spiders eat centipedes. Lizards eat centipedes. Hawks eat snakes. Snakes eat lizards. How many arrows point toward the centipede??
A
three
B
none
C
two
D
one
9) Which correctly describes a decomposer and what it consumes?
A
hummingbird: collects energy rich nectar
B
bacteria: consumes dead organisms
C
eathworm: collects energy from the sun
D
frog: eats a variety of insects
10) Any organism on a complete food web that have arrows ONLY pointing away from them must be_________.
A
omnivores
B
decomposers
C
herbivores
D
producers
11) Grass that gains energy from the sun is an example of a
A
decomposer
B
consumer
C
parasite
D
producer
12) A diagram with arrows showing energy flow from grass, to a rabbit, to a fox is
A
an energy pyramid
B
a food web
C
a population chart
D
a food chain
13) After one species disappears, the other species in the ecosystem
A
are thrown out of balance
B
benefit
C
are unaffected
D
die
14) Limiting factors determine an area’s carrying capacity because
A
the number of animals is limited.
B
ecosystems are small
C
the number of animals is unlimited.
D
animals need resources to survive.
15) A food web has two organisms with arrows only pointing toward them. This is because ________
A
they make their own food.
B
they need no energy.
C
nothing shown eats them.
D
they give energy to others.
16) What does one arrow on a food web show?
A
the flow of energy from primary consumers to secondary consumers
B
the flow of energy from primary consumers to producers
C
the flow of energy from a producer to a tertiary consumer
D
the flow of energy from secondary consumers to primary consumers
17) An arrow between a grass and a prairie dog shows.
A
energy flowing from the grass to the prairie dog
B
energy flowing from primary consumer to a secondary consumer
C
energy flowing from the priarie dog to the grass
D
energy flowing from a primary consumer to a producer
18) Which of the following is NOT a prey adaptation?
A
warning coloration
B
chemical defenses
C
parasitism
D
camouflage
19) Nature's recyclers are
A
decomposers
B
producers
C
omnivores
D
predators
20) Which of the following is the correct order in a food chain?
A
sun→consumers→predators→parasites→hosts
B
sun→producers→herbivores→scavengers→carnivores
C
sun→producers→decomposers→consumers→omnivores
D
sun→producers→herbivores→carnivores→scavengers
*select an answer for all questions
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