Interactions among Living Things Answers

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1
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Which is the best example of predation?

A
Hookworms live in the intestines of dogs and feed on their blood.
B
Barn owls often capture and eat mice that live in fields.
C
A colony of termites protects the eggs laid by a queen termite.
D
Two species of shellfish grow in the same shallow ocean waters.
2
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Salazar made a chart to describe some relationships among species. Relationships among SpeciesXYBoxing crabs gently carry anemones in their claws to sting predators and keep them away. The anemones feed off bits of food the crab drops.Fleas live on the warm body of a dog, biting the dog and eating its blood. The flea bites cause the dog to itch. Which headings best complete the chart?

A
X: CompetitionY: Parasitism
B
X: CompetitionY: Commensalism
C
X:CommensalismY: Mutualism
D
X: MutualismY: Parasitism
3

Certain bacteria live in plant roots and receive sugars from the plants. The bacteria provide a source of useful nitrogen for the plants.This best describes which type of relationship?

A
parasitism
B
competition
C
mutualism
D
predation
4

Which best compares mutualism, parasitism, and commensalism between two organisms?

A
Both organisms benefit in mutualism and parasitism, but only one benefits in commensalism.
B
Both organisms benefit in mutualism, only one benefits in parasitism, and none benefits in commensalism.
C
Both organisms benefit in mutualism and commensalism, but only one benefits in parasitism.
D
Both organisms benefit in mutualism, but only one in parasitism and commensalism.
5

Corn plants and milkweed plants grow in the same area. Over several years, the milkweed plants have taken over the field and the corn plants no longer have space to grow.This best demonstrates which type of an interaction between the plants?

A
cooperation
B
parasitism
C
commensalism
D
competition
6

Which describes an interaction in which organisms work together so that all organisms in the group benefit?

A
cooperation
B
parasitism
C
commensalism
D
competition
7

In which type of relationship do both species always benefit?

A
mutualism
B
symbiosis
C
commensalism
D
competition
8

Which is the best example of competition in a forest ecosystem?

A
A colony of bees builds and protects a hive together.
B
Ticks live and feed on deer.
C
Wolves hunt and eat rabbits.
D
Blue jays and finches nest in the same oak trees.
9

A relationship in which one species benefits and the other neither benefits nor is harmed is

A
mutualism.
B
predation.
C
commensalism.
D
competition.
10

Which describes an interaction in which two organisms that interact must use the same limited resources?

A
commensalism
B
parasitism
C
predation
D
competition

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