biology 1 ( chapter 13 )
a major regional or global community of organisms is called
a biome
which phrase best describes biodiversity
an ecosystem
which of the following provide most of the energy in an ecosystem
bacteria
which of the following parts of figure 13.2 are biotic factors
deer,mushroom,tree
what do all the biotic and abiotic factors in a given area make up
detrivores
a group of organisms of the same species that live in the same area is called
ecosystem
which is part of the hydrolic cycle
evaporation
an organism that has an unusually large effect on an ecosystem is called a
keystone species
an ecologist counts weeds to monitor their populatioln's. which of the following best describes their method
observation
what does the diagram in figure 13.1 show
primary consumers
organisms that feed on dead matter are called
producers
which organisms help convert gaseous nitrogen int ammonia in the nitrogen cycle
pyramid of numbers
almost all autotrops get their energy from
sunlight
which model shows the number of organisms at each trophic level in an ecosystem
the carbon cycle
which phrase best describes biodiversity
the number of species in an ecosystem