Quiz about Symbiosis and Competition

Question 1

Which situation best represents a mutualistic relationship?

Accepted Answer

An orchid being pollinated by a nectar collecting wasp

Answer

A tapeworm absorbing nutrients from the intestine of a dog

Answer

A human losing blood to a feeding mosquito

Answer

An armadillo rooting in the soil at the base of an oak tree

Question 2

Which of these best describes the relationship

between epiphytes and trees?

Accepted Answer

Commensalism

Answer

Parasitism

Answer

Migration

Answer

Predation

Question 3

Which of these is the best example of a mutualistic relationship in an aquatic environment?

Accepted Answer

Some fish have bacteria living in their digestive tract that help the fish digest food.

Answer

Some fish can survive repeated infections by harmful bacteria.

Answer

Some bacteria are present in aquatic food chains in which fish are secondary consumers.

Answer

Some bacteria are aquatic decomposers that recycle nutrients useful to fish.

Question 4

Which of these best represents a mutualistic relationship?

Accepted Answer

Hummingbird/blossom

Answer

Bull snake/mouse

Answer

White-tailed deer/grass

Answer

Spadefoot toad/cricket

Question 5

Which of the following is an example of mutualism?

Accepted Answer

A human uses a dog to protect a flock of sheep. The dog is given food and shelter.

Answer

A wasp injects its eggs inside the body of a caterpillar. The eggs hatch and eat the caterpillar.

Answer

A bird builds a nest in a tree.

Answer

A flower grows next to a bush.

Question 6

Which word best describes the fungus in the

situation to the right?

Accepted Answer

Predator

Answer

Producer

Answer

Parasite

Answer

Decomposer

Question 7

Rhizobia bacteria help a plant gain the nitrogen it needs. In return, the plant gives Rhizobia shelter and food. Which of these best describes the relationship between rhizobia and bean plants?

Accepted Answer

mutualism

Answer

parasitism

Answer

opportunism

Answer

commensalism

Question 8

Within a certain community, crows actively eat brightly colored beetles. Which interaction is being displayed between the population of crows and the population of beetles?

Accepted Answer

predation

Answer

parasitism

Answer

mutualism

Answer

commensalism

Question 9

Aphids are herbivores that can live in gardens and destroy food as it grows. Which of the following could provide competition to the aphids in a garden ecosystem?

Accepted Answer

The introduction of a species to the environment that ate vegetables

Answer

The removal of spiders from environment through pesticide use

Answer

The creation of a new breed of tomato plant with larger fruit

Answer

The addition of a new species to the ecosystem that preys on aphids

Question 10

Plants have adapted many different ways of spreading their seed. These include the use of fruit carried away by animals and aerodynamic seeds carried by the wind. These adaptions would prevent plants from doing which of the following?

Accepted Answer

Competing with offspring for available water and sunlight

Answer

Becoming parasitic towards members of their own species

Answer

Being forced to prey on their offspring when nutrient levels dropped

Answer

Creating mutualistic relationships with pollinating insects

Question 11

Males of the same species often compete in a ritualistic

fashion as shown in the picture of red deer. These deer are most likely competing for the ability to do which of the following?

Accepted Answer

reproduce

Answer

drink water

Answer

obtain food

Answer

find shelter

Question 12

Animals of the same species might be forced to begin competing with one another under which of the following circumstances?

Accepted Answer

deforestation reduces available habitats

Answer

hunting of their prey becomes criminal

Answer

more edible vegetation is introduced

Answer

predators are removed from the environment

Question 13

The populations of native species often decline after new species are introduced to an ecosystem by humans. This is because non-native species -

Accepted Answer

occupy the same niche as native species

Answer

reduce the use of pesticides by humans

Answer

provide diversity to the ecosystem

Answer

are always preferred by natural selection

Question 14

When an organism is introduced into a new ecosystem the population grows exponentially. However, the population stops increasing in size when which of the following occurs?

Accepted Answer

Organisms begin competing for food

Answer

Offspring avoid parasite infections

Answer

New water sources are discovered

Answer

Their predator population decreases

Question 15

Two species of paramecium, P. aurelia and P. caudatum, were grown separately and together. These organisms were not observed being parasitic or predatory; however, when grown together with P. aurelia, the P. caudatum population was almost completely gone after 10 days. What would most likely cause this to occur?

Accepted Answer

The P. caudatum population could not compete with the P. aurelia population for resources

Answer

Another species of microorganism must have been present in the growth medium

Answer

The P. aurelia population became a photosynthetic organism that could make its own food

Answer

Experimental error caused contamination that only affected the P. caudatum population

Question 16

When a population exceeds its carrying capacity, the ecosystem no longer provides enough resources for all of the organisms to survive. At this point, what will begin within the population?

Accepted Answer

intraspecific competition

Answer

interspecific competition

Answer

parasitic behaviors

Answer

mutualistic relationships

Symbiosis and Competition

25 questions

Which situation best represents a mutualistic relationship?

Which of these best describes the relationship
between epiphytes and trees?

A hummingbird feeds on the nectar of a flowering plant. In this process the bird gains nutrition while spreading the plant’s pollen to other flowers. The relationship between hummingbirds and flowering plants can be described as —

A tick feeding on the blood of a dog is an example of —

Beechdrops (Epifagus virginiana) are leafless plants that lack chlorophyll. Beechdrops get their nourishment from the roots of beech trees, which reduces the amount of nutrients available to the trees themselves. This interaction is best described as —

Which of these is the best example of a mutualistic relationship in an aquatic environment?

An oakworm caterpillar feeds on the leaves of an oak tree. This type of interaction is —

Which of these best represents a mutualistic relationship?

This relationship is an example of —

Which of the following is an example of mutualism?

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