Biology Fall Semester 2016-17

A group of wolves is an example of

• an ecosystem
• a population
• a community
• a biome

Which is both a primary and secondary consumer?

• herbivore
• carnivore
• omnivore
• detritivore

Which best describes biodiversity?

• the number of individuals in a population
• the amount of biomass in a community
• the amount of available energy in a food web
• the number of species in an ecosystem

An ecologist surveys weeds to monitor their populations. Which of the following best describes the ecologist's methods?

• modeling
• observation
• experimentation
• hypothesizing 

Which best describes an ecosystem?

• all of the different species living in a given area
• all of the members of a single species living in a given area
• all of the biotic and abiotic factors in a given area
• all of the non-living factors that characterize a given area

Bacteria are important in the nitrogen cycle because they...

• help convert nitrogen into a form that organisms can use 
• respire, returning carbon dioxide into the atmosphere
• decay and eventually form fossil fuels 
• produce sugars that plants can use

Which of the following parts of the figure are biotic factors?

• soil, mushroom, tree
• soil, sunlight, river
• deer, mushroom, tree
• sunlight, river, deer

All organisms that inhabit the desert make up a(n)

• ecosystem
• biome
• species
• population

Which statement is true for producers in an ecosystem?

• consume most of the biomass
• fix most of the nitrogen
• produce most of the CO2
• provide most of the energy

What are two processes by which autotrophs make food?

• chemosynthesis and photosynthesis
• photosynthesis and respiration
• chemosynthesis and decomposition
• decomposition and combustion