6.12 EF

Ecosystem is the level of organization that is best described as including - 

• only a single individual of a single species plant or animal
• two species that live in the same habitat and depend on each other
• all of the abiotic factors which characterize a geographic area
• various species in an area and the abiotic factors on which they depend

Which of the following describes an organism that demonstrates a behavioral adaptation to receive a benefit from a non-living component of its habitat?

• Tree sloths spend most of their days high in the canopy of the rainforest trees to avoid predators
• Remora fish swim near sharks and eat the food scraps which are left behind when sharks eat
• Honeybees visit flower after flower, gathering nectar, which they turn into food.
• Bearded dragons bask in the sunlight in order to warm up their bodies to the optimum temperature

Sagebrush is the dominant vegetation in Yellowstone National Park. Collectively, all the sagebrush make up 

• a community
• an ecosystem
• a population
• a niche

The group of anemonefish swimming together in the reef environment represents the —

• the first level of organization
• the second level of organization
• the third level of organization
• the fourth level of organization

The stingray, group of anemonefish, coral, starfish, saltwater, and sand all make up a level of organization called a reef

• organism
• ecosystem
• community
• population

Which level of organization does the interaction of a tropical fish with the living tube sponge best represent?

• a community
• an organism
• a population
• an ecosystem

Which of these is a biotic factor in a river ecosystem?

• the types of microorganisms that live in the river water
• the amount of soil and other particles carried by the river
• the speed at which the river water flows toward the ocean
• the amount of rain that flows off the land and into the river

Which of the following correctly lists the levels of organization from least complex to most complex?

• Community, Organism, Population, Ecosystem
• Population, Community, Ecosystem, Organism
• Organism, Population, Community, Ecosystem
• Ecosystem, Population, Organism, Community

A hollow, sealed glass sphere contains sand, water, air, algae, and tiny brine shrimp. The sphere is a model ecosystem. Which of these is a biotic factor of this ecosystem?

• air
• algae
• sand
• water

A polar bear interacts with abiotic factors in its environment in all of the following ways EXCEPT by —

• sliding across the ice
• swimming in the cool water
• eating fish that it catches
• blending into the snow to hide