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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
host, parasite
B
parasite, prey
C
predator, host
D
parasite, host
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
consumer
B
producer
C
decomposer
D
scavenger
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
predator
C
scavenger
D
producer
4) Spiders eat centipedes. Lizards eat centipedes. Hawks eat snakes. Snakes eat lizards. How many arrowspoint away from the centipede?
A
three
B
one
C
two
D
none
5) Organisms that can make their own food from sunlight are called
A
decomposers
B
consumers
C
producers
D
carnivores
6) Grass is eaten by a prairie dog. The prairie dog is eaten by a coyote. This is an example of
A
an omnivore
B
an abiotic element
C
a food chain
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 coyote is bigger
D
the prairie dog eats the coyote
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
frog: eats a variety of insects
B
eathworm: collects energy from the sun
C
hummingbird: collects energy rich nectar
D
bacteria: consumes dead organisms
10) Any organism on a complete food web that have arrows ONLY pointing away from them must be_________.
A
herbivores
B
decomposers
C
producers
D
omnivores
11) Grass that gains energy from the sun is an example of a
A
parasite
B
consumer
C
producer
D
decomposer
12) A diagram with arrows showing energy flow from grass, to a rabbit, to a fox is
A
a food chain
B
a food web
C
an energy pyramid
D
a population chart
13) After one species disappears, the other species in the ecosystem
A
are thrown out of balance
B
are unaffected
C
die
D
benefit
14) Limiting factors determine an area’s carrying capacity because
A
ecosystems are small
B
animals need resources to survive.
C
the number of animals is limited.
D
the number of animals is unlimited.
15) A food web has two organisms with arrows only pointing toward them. This is because ________
A
nothing shown eats them.
B
they give energy to others.
C
they make their own food.
D
they need no energy.
16) What does one arrow on a food web show?
A
the flow of energy from secondary consumers to primary consumers
B
the flow of energy from primary consumers to secondary consumers
C
the flow of energy from a producer to a tertiary consumer
D
the flow of energy from primary consumers to producers
17) An arrow between a grass and a prairie dog shows.
A
energy flowing from the priarie dog to the grass
B
energy flowing from the grass to the prairie dog
C
energy flowing from a primary consumer to a producer
D
energy flowing from primary consumer to a secondary consumer
18) Which of the following is NOT a prey adaptation?
A
chemical defenses
B
warning coloration
C
camouflage
D
parasitism
19) Nature's recyclers are
A
producers
B
decomposers
C
predators
D
omnivores
20) Which of the following is the correct order in a food chain?
A
sun→producers→herbivores→scavengers→carnivores
B
sun→consumers→predators→parasites→hosts
C
sun→producers→herbivores→carnivores→scavengers
D
sun→producers→decomposers→consumers→omnivores
*select an answer for all questions
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