Chapter 37 Quiz 1

A community is composed of

• potentially interacting populations of different kinds of organisms
• living organisms and their non-living environment
• one species of organism living in a specific environment on Earth
• the factors that constitute an organism's niche

When two different populations in a community benefit from their relationship with each other, the result is called

• parasitism
• competition
• benefism
• mutualism

Which of the following is an example of predation?

• a lizard's camoflauge
• a goldfinch feeding on the seeds of a thistle plant
• the vivid colors of the poison-arrow frog in Costa Rica
• a hawk swooping down quickly to capture, kill and eat a king snake

The sum total of an organism's use of the biotic and abiotics resources of its habitat constitutes its

• range
• niche
• environment
• evolution

In an ecosystem you would expect to find interspecific competition between

• two wasp species that mimic each other's appearance
• populations of two species that occupy the same niche
• males and females of a species in which both sexes occupy the same niche
• a prey species and its predator

In a hypothetical food chain consisting of grass, grasshoppers, sparrows, and hawks, the grasshoppers are

• secondary consumers
• primary producers
• primary consumers
• secondary producers

In a food chain consisting of
phytoplankton-->zooplankton--->
fish-->fisherman, the fishermen are 

• secondary consumers
• secondary producers
• tertiary consumers
• quaternary consumers

In a certain ecosystem, field mice are preyed on by snakes and hawks. The entry of wild dogs into the system adds another predator of the mice. Of the following, the most likely short-term result of this addition is

• a tendency for hawks to prey on the dogs
• an increase in snake population
• a reduction in numbers of mice
• migration of the hawks to another ecosystem

Which of the following is a good description of an ecological niche?

• synonymous with an organism's specific trophic level
• the interactions of the organism with other members of the community
• how an organism uses the biotic and abiotic resources in the community
• the organism's role in recycling nutrients in its habitat

Dwarf mistletoes are flowering plants that grow on certain trees. They obtain nutrients and water from the vascular tissues of the trees. The trees get no benefit from this interaction. What type of relationship is this?

• commensalism
• competition
• mutualism
• parasitism