AnswersScience 7 B M12 2526 S2Interactions among Living Things

Interactions among Living Things Answers

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In a desert ecosystem, coyotes and rattlesnakes both eat the same type of mouse as a primary part of their diets. Recently, coyotes have been hunted and killed by people, decreasing the overall coyote population.How will this most likely affect the rattlesnake population over time?

A
It will decrease because coyotes are the prey.
B
It will increase because coyotes are the prey.
C
It will decrease because coyotes are the competition.
D
It will increase because coyotes are the competition.
6

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7

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

A
mutualism.
B
predation.
C
commensalism.
D
competition.
8

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
9

Which statement best compares competition, cooperation, and predation between two organisms?

A
Cooperation is a positive interaction between the two organisms, and predation and competition result in a negative interaction for at least one organism.
B
Cooperation and competition are positive interactions between the two organisms, and predation results in a negative interaction for at least one organism.
C
Cooperation and predation are negative interactions between the two organisms, and competition results in a positive interaction for at least one organism.
D
Cooperation results in a negative interaction for at least one organism, and competition and predation are positive interactions between the two organisms.
10

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.
11

hostcompetitorpreyparasite

A
host
B
competitor
C
prey
D
parasite
12

What are the three types of symbiotic relationships?

A
competition, cooperation, predation
B
commensalism, mutualism, parasitism
C
parasitism, predation, competition
D
mutualism, cooperation, commensalism
13

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.
14

In which type of relationship do both species always benefit?

A
mutualism
B
symbiosis
C
commensalism
D
competition
15

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

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