competitive exclusion factor
No two species can occupy the same niche at the same time because of the ____________.
Mutualism
A symbiotic relationship in which both species benefit is ___________.
One organism is harmed in parasitism and no organisms are harmed in commensalism.
How is parasitism different from commensalism?
a. Both organisms benefit in parasitism and only one organism benefits in commensalism.
b. One organism benefits in parasitism and no organisms benefit in commensalism.
c. One organism is harmed in parasitism and both organisms are harmed in commensalism.
d. One organism is harmed in parasitism and no organisms are harmed in commensalism.
a. Both organisms benefit in parasitism and only one organism benefits in commensalism.
b. One organism benefits in parasitism and no organisms benefit in commensalism.
c. One organism is harmed in parasitism and both organisms are harmed in commensalism.
d. One organism is harmed in parasitism and no organisms are harmed in commensalism.
a lava flow
Primary succession would most likely occur after ________.
Secondary succession begins on soil and primary succession begins on newly exposed surfaces.
What is one difference between primary and secondary succession?
a. Primary succession is rapid and secondary succession is slow.
b. Secondary succession begins on soil and primary succession begins on newly exposed surfaces.
c. Primary succession modifies the environment and secondary succession does not.
d. Secondary succession begins with lichens and primary succession begins with trees.
a. Primary succession is rapid and secondary succession is slow.
b. Secondary succession begins on soil and primary succession begins on newly exposed surfaces.
c. Primary succession modifies the environment and secondary succession does not.
d. Secondary succession begins with lichens and primary succession begins with trees.
Living organisms modify their environment a little at a time.
Which of the following occurs during the ecological succession of an ecosystem?
a. An ecosystem reaches a final, unchanging stage.
b. Animals move out of the ecosystem until succession is complete.
c. Living organisms modify their environment a little at a time.
d. Parts of communities split off to form new communities.
a. An ecosystem reaches a final, unchanging stage.
b. Animals move out of the ecosystem until succession is complete.
c. Living organisms modify their environment a little at a time.
d. Parts of communities split off to form new communities.
Clearing and farming.
A tropical rain forest may be unable to be returned to its original climax community after which disturbance?
Temperate woodland.
Which biome has long cold winters and short summers, and is home to conifers?
a. savanna
b. temperate woodland
c. tundra
d. boreal forest
a. savanna
b. temperate woodland
c. tundra
d. boreal forest
Whitetail deer.
Which animal would be found in the biome that has cold to moderate winters, warm summers, and fertile soils; and is home to a variety of vegetation, such as coniferous trees, broadleaf deciduous trees, flowering shrubs, and ferns?
not classified into major biomes
The North Pole and the South Poles are ________.
A coastal ocean system at a temperate latitude.
Which aquatic ecosystem is likely to be the warmest?
a. a benthic system in the middle of the ocean
b. an open ocean system near Antarctica
c. a coastal ocean system at a temperate latitude
d. an intertidal zone in a polar region
a. a benthic system in the middle of the ocean
b. an open ocean system near Antarctica
c. a coastal ocean system at a temperate latitude
d. an intertidal zone in a polar region
amount of nitrogen, oxygen, and other elements dissolved in the water
The nutrient availability of aquatic ecosystems is the _________.
a. amount of nitrogen, oxygen, and other elements dissolved in the water.
b. number of other organisms present in the water.
c. amount of rainfall the water receives.
d. number of different animal species living in the water.
a. amount of nitrogen, oxygen, and other elements dissolved in the water.
b. number of other organisms present in the water.
c. amount of rainfall the water receives.
d. number of different animal species living in the water.
No. Zooplankton feed on phytoplankton and phytoplankton cannot photosynthesize in the dark.
Are you likely to find zooplankton in the aphotic, benthic zone of an ocean?
a. Yes. Zooplankton are chemosynthetic autotrophs.
b. Yes. Zooplankton can photosynthesize in the dark.
c. No. Zooplankton feed on phytoplankton and phytoplankton cannot photosynthesize in the dark.
d. No. Zooplankton cannot chemosynthesize in the dark without the presence of oxygen in the water.
a. Yes. Zooplankton are chemosynthetic autotrophs.
b. Yes. Zooplankton can photosynthesize in the dark.
c. No. Zooplankton feed on phytoplankton and phytoplankton cannot photosynthesize in the dark.
d. No. Zooplankton cannot chemosynthesize in the dark without the presence of oxygen in the water.
Water does not always cover a wetland as it does a lake or pond.
Which is one way a freshwater wetland differs from a lake or pond?
a. Water flows in a lake or pond but never flows in a wetland.
b. Wetlands are nesting areas for birds, but lakes and ponds are not.
c. Water does not always cover a wetland as it does a lake or pond.
d. Wetlands are salty, but lakes and ponds are fresh.
a. Water flows in a lake or pond but never flows in a wetland.
b. Wetlands are nesting areas for birds, but lakes and ponds are not.
c. Water does not always cover a wetland as it does a lake or pond.
d. Wetlands are salty, but lakes and ponds are fresh.
mutualism
Some birds are known as honey guides because they may be followed by humans to wild beehives. When the humans take honey from the hives, the birds are able to feast on the honey and bees, too. This type of relationship can best be described as ________.
Competitive.
Organisms with overlapping niches probably have which type of relationship?
Bacteria take nitrogen from the air and convert it to a form usable by plants.
Which process describes nitrogen fixation?
a. animals eat plants containing nitrogen and return it to the soil through urination
b. bacteria take nitrogen from the air and convert it to a form usable by plants
c. organisms die and are decomposed into ammonia in the soil
d. plants take nitrogen from the air and store it in their roots
a. animals eat plants containing nitrogen and return it to the soil through urination
b. bacteria take nitrogen from the air and convert it to a form usable by plants
c. organisms die and are decomposed into ammonia in the soil
d. plants take nitrogen from the air and store it in their roots
