Ecosystems Test Review Fall 2014 (Part 1 Of 3): Question Preview (ID: 20918)

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What will most likely happen if two species compete for the exact same resources in the same ecosystem at the same time?
a) Eventually the resources will be depleted and both species will die out.
b) Eventually the ecosystem will adapt to provide enough resources for both species.
c) Eventually one species will outcompete the other into extinction or emigration.
d) Eventually one species will hunt the other species until it becomes extinct.

Which of the following is NOT a freshwater ecosystem?
a) lake
b) pond
c) river
d) tidal pool

Suppose an ecosystem suddenly loses all of its consumers to a disease. Which of the following scenarios would most likely happen?
a) Carnivores and omnivores would starve to death.
b) Energy would no longer enter the ecosystem.
c) The ecosystem would become overgrown with plants.
d) Plant-eating organisms would become abundant.

Why can two organisms that live in different areas not compete?
a) Competition is an interaction between species that share the same resources.
b) Competition is an interaction between individuals in the same population.
c) Competition is an interaction that involves only one shared resource.
d) Competition is an interaction that requires species isolation.

A population is made up of individual members of the same
a) community
b) ecosystem
c) habitat
d) species

Why would you expect to see greater species diversity in marine organisms than in freshwater organisms?
a) Freshwater environments are typically larger than marine environments.
b) Freshwater ecosystems cover a very small percentage of Earth's surface.
c) Marine environments are warmer than freshwater environments.
d) Marine environments cover a very small percentage of Earth's surface.

All primary consumers are
a) herbivores
b) carnivores
c) omnivores
d) producers

A volcanic eruption on the coast creates a new landmass. Soon, plants begin to sprout on top of the lava. This is an example of
a) competition
b) primary succession
c) secondary succession
d) predation

Why might you find fewer photosynthetic organisms at deeper levels of an ocean?
a) Photosynthetic organisms only float and cannot sink.
b) The sun's rays cannot reach the deep ocean.
c) Photosynthetic organisms cannot survive in cold water.
d) Photosynthetic organisms cannot withstand extreme pressure.

What is one benefit to an ecosystem caused by predation?
a) Biotic factors are maintained and conserved.
b) Natural disasters do not affect the ecosystem.
c) Population sizes are controlled.
d) Inferior species become extinct.

A saltwater inlet is blocked from the ocean by shifting sands. Water in the inlet evaporates more quickly than it is replaced. What will most likely be the result of this evaporation?
a) The water will become freshwater.
b) The water will maintain the same level of salinity.
c) The water will become less salty.
d) The water will become more salty.

During the dry season, the hyena population gathers in herds close to sources of water. What type of population distribution does this exemplify?
a) assymetrical
b) uniform
c) random
d) clumped

Microscopic mites live in human eyelashes, feeding on tiny bits of dead skin that they clear away from the human's eye. What type of species interaction is this?
a) predation
b) mutualism
c) commensalism
d) parasitism

Which statement best describes the typical relationship of a terrestrial biome and its surrounding water community?
a) The water community provides only short-term benefits to the terrestrial biome.
b) The terrestrial biome is highly dependent on the water community.
c) The water community usually harms the terrestrial biome.
d) The terrestrial biome is unaffected by the water community.

Bacteria in terrestrial ecosystems play an important role in ecosysyems as
a) primary consumers
b) producers
c) decomposers
d) viral agents

What is a climax community?
a) a community with a relatively stable variety of species
b) a community with only keystone species
c) a community with several pioneer species
d) a community with mainly predators

Which of the following best describes all pioneer species?
a) species at the top of the food chain
b) species that compete with other organisms
c) species that cooperate with other organisms
d) species that colonize new surfaces

A food web consists of
a) one producer, but many consumers
b) single energy sources
c) multiple food chains
d) many primary consumers, but one tertiary consumer

Which of the following is an example of parasitism?
a) clownfish living in a sea anemone
b) fleas living on a dog
c) blue jays living in a maple tree
d) wolves and rabbits living in the forest

The cottontail rabbit is an herbivore. What does its diet consist of?
a) vegetables and berries
b) small rodents and snakes
c) twigs and small reptiles
d) grasses and insects

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