Chapter 37 Quiz 2

With a few exceptions, most of the food chains studied by ecologists have a maximum of how many links?

• 2
• 10
• 3
• 5

Which of the following members of a marine food chain occupies a similar trophic level to a grasshopper in a terrestrial food chain. 

• lobster
• zooplankton
• seal lion
• phytoplankton

Approximately how many kg of carnivore production can be supported by a field plot containing 2000 kg of plant material?

• 2
• 200
• 20
• 2000

The feeding relationships among the species in a community determine the community's 

• secondary succession
• ecological niche
• species richness
• trophic structure

Food chains are sometimes short because

• most of the energy in a trophic level is lost as it passes to the next higher level
• most producers are inedible
• only a single species of herbivore feeds on each plant species
• predator species tend to be less diverse and less abundant than prey species 

We expect that a keystone species that is a predator will 

• reduce the diversity of the community
• maintain the species diversity in a community
• harvest prey species down to extinction
• help many of its prey reproduce

Non-native species that are introduced in new environments, spread far beyond the original point of introduction, and cause damage are called

• destructive species
• proprietary species
• keystone species
• invasive species

About how much of the energy in the producers of an ecosystem will be available to secondary consumers in this ecosystem?

• about 1%
• about 50%
• about 10%
• 100%

In a tide pool, 15 species of invertebrates were reduced to eight after one species was removed. The species removed was most likely a(n)

• resource partitioner
• keystone species
• producer
• invasive species

True or False: Several species of primary consumers may feed on the same species of producer.

• True
• False