A student wrote several observations (seen below) in a field notebook. Which term best classifies all of the student's observations?
Population
Food chain
Ecosystem
Community
A researcher observing an ecosystem describes the amount of sunlight, precipitation, and type of soil present. Which factors is the researcher most likely describing?
Biotic factors in a forest
Biotic factors in a tundra
Abiotic factors in an ocean
Abiotic factors in a prairie
Which sequence correctly describes the flow of energy between organisms in the marine food web below?
From seals to penguins to krill
From whales to krill to small fish
From sea birds to seals to penguins
From small fish to penguins to seals
The lowest level of environmental complexity that includes living and nonliving factors is the...
Biome
Community
Ecosystem
Biosphere
Carbon cycles through the biosphere in all of the following processes EXCEPT...
photosynthesis
transpiration
burning of fossil fuels
decomposition of plants and animals
Nutrients move through an ecosystem in…
Biogeochemical cycles
Water cycles
Energy pyramids
Ecological pyramids
What are the physical, or nonliving components of an ecosystem called?
Abiotic factors
Temperate conditions
Biotic factors
Antibiotic factors
A species of snapping turtles has a tongue that resembles a worm. The tongue is used to attract small fish. Which best describes the interaction between the fish and the snapping turtle?
Predation
Symbiosis
Parasitism
Competition
Please enter your question here.
Plants assimilate nitrites and convert them into nitrogen gas
Decomposers directly convert ammonium into nitrogen gas
Soil bacteria convert nitrates into nitrogen gas
Nitrogen-fixing bacteria in plant roots convert nitrates into nitrogen gas
The relationship between a tick and its host is an example of…
Mutualism
Parasitism
Commensalism
Competition