Exam 35: An Interactive Living World 2: Communities in Ecology

A red-shouldered hawk chases a falcon away from a dead squirrel.This is an example of:

Refer to the figure below, and then answer the following question(s). -The graph indicated by a "2" demonstrates which principle of community ecology?

Competition among species may lead to resource partitioning in an ecosystem.

Kudzu replacing native plants is a type of predation.

A horseshoe crab walking on the bottom of shallow coastal waters,feeding on algae,invertebrates,and other small life forms,describes the horseshoe crab's ________.

Two moths with similar markings each produce a chemical that makes their bird predators sick to their stomach if eaten.Which principle of ecology does this demonstrate?

You are doing field work on a small,uninhabited island.You are supplementing your food supply with fish that live in some of the ponds on the island.You catch a brightly colored fish with red and black stripes,filet it,pan fry it,and spit out your first bite because it tastes like it had been soaked in urine.Back at camp,your guide from a nearby island is pan frying fish with red and black stripes he caught in an adjacent pond.When you tell him not to eat those,he smiles and says these are the best-tasting fish in the whole island chain! You look closer and see the pattern of the red and black stripes is just a little different from the fish you caught.What principle of ecology have you just experienced firsthand?

The Venus flytrap,a carnivorous plant,might be considered a:

To be a keystone species,an organism must be the most numerous species in an environment.

Low genetic diversity,narrow geographic distribution of species,and few different species in an area would be correlated with low ________.

Communities with the most biodiversity are found in areas with low geographic diversity.

What is the relationship between a biodiversity and geographic diversity?

When placed in the same habitat,Paramecium aurelia will replace Paramecium caudatum.This is an example of:

In interspecific competition,the competitors are generally competing for:

A species whose absence would bring about major changes in a community is called a ________.

You are doing biology field work studying two species of lizards on a small volcanic island.Although quite hostile to each other when they accidentally meet,the two species usually remain in separate parts of the island.Species A seems to live and hunt insects only in the lower grassland part of the island.Species B seems to live and hunt only in the upper rocky areas.Species A has a short tongue but has longer legs and is a faster runner.Species B is short,squat,runs slower,but has a long tongue.You observe Species A chasing down some pretty large,fast-moving insects,while Species B meanders from rock to rock,using its long tongue to get insects hiding between rocks and in cracks.What principle of ecology do your two lizard species demonstrate?

An interaction between species in which one benefits and the other is essentially unaffected is ________.

In a typical ecosystem,a species whose removal would have a bigger impact than any other would be a/an:

Demonstrate why keystone species play a large role in community despite the fact that they may be present in relatively small numbers.