Self-Quiz

Life on Earth Chapter 29 Community Interactions
Self-Quiz

Which of the following is not usually true of climax communities?
1. They have more species than early successional communities.
2. They have more organic matter in the soil.
3. They have more trophic levels.
4. They have more short-lived species.
5. They have more productivity.
What were the differences in the niches of the paramecia in Gause's second experiment that allowed them to coexist?
1. food eaten
2. body size
3. feeding area
4. preferred water temperature
5. preferred pH
Which of the following is an example of a commensal relationship?
1. orchids growing on tree limbs
2. flowering plants and their pollinators
3. lupines and blue butterflies
4. bats and moths
5. monarch and viceroy butterflies
What is the function of aggressive mimicry?
1. to hide a prey from a predator
2. to warn a predator that a prey is dangerous
3. to warn a predator that a prey is distasteful
4. to keep prey from recognizing a predator
5. to startle a prey when it sees a predator
What is coevolution?
1. two species selecting for different traits in each other
2. individuals of two species living together
3. the presence of two species in the same community
4. two species evolving together through time
5. individuals of two species learning how to coexist with or to hunt with each other
The competitive exclusion principle implies that:
1. Coexisting species can use the same resources.
2. Coexisting species cannot eat exactly the same things.
3. Coexisting species cannot have identical ecological interactions.
4. Coexisting species cannot be exactly the same size.
5. Coexisting species cannot be closely related to one another.
When species act as agents of natural selection on each other, it is called
1. succession
2. niche selection
3. camouflage
4. symbiosis
5. coevolution
Which of the following is not a major category of interspecific or intraspecific interaction among organisms?
1. symbiosis
2. predation
3. competition
4. speciation
5. All of these are major categories of interactions.
If you were studying the niche of a species of bird, you might study
1. the food it eats
2. its predators
3. the temperatures it needs to survive
4. the places where it builds its nests
5. all of these
If similar species each occupy a smaller niche when they live together than they would if they lived alone, they are said to be
1. involved in succession
2. involved in intraspecific competition
3. partitioning their resources
4. coevolving
5. increasing niche overlap
Bright coloration is an effective defense against predators because:
1. The predators are color blind and cannot see the prey.
2. The predators can see the color and learn that the brightly colored prey species is toxic or unpalatable.
3. Predatory animals are too stupid to learn anything; thus, color is unimportant.
4. Symbiosis allows predators to coexist with prey so that neither becomes extinct.
5. Commensal relationships such as this are the result of coevolution.
A species that is a mimic may
1. form chemicals that deter predators
2. have similar behavior to another species
3. resemble its surroundings
4. use bright colors to warn that it is harmful
5. produce "smoke screens"
The interspecific relationship between two species that occurs when one species lives in or on a single host individual of the other species is called
1. commensalism
2. coevolution
3. mutualism
4. parasitism
5. predation
A close interaction between organisms of two different species, which is beneficial to one of the organisms but has no effect on the survival of the other, is known as
1. mutualism
2. commensalism
3. parasitism
4. mimicry
5. symbiosis
When all vegetation is removed from a site by human activity or by natural forces such as volcanic activity, _________ species are the first to colonize the site.
1. prokaryotic
2. pioneer
3. climax
4. deciduous
5. eukaryotic

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