Ecology Quiz

What is the maximum population size that an environment can sustain called?

• Population density

• Carrying capacity

• Birth rate

• Mortality rate

In a food chain, the first trophic level consists of which type of organisms?

• Carnivores

• Herbivores

• Producers

• Decomposers

During ecological succession, what are the initial colonizers called?

• Climax species

• Pioneer species

• Secondary species

• Tertiary species

Which cycle includes processes such as evaporation, condensation, and precipitation?

• Carbon cycle

• Nitrogen cycle

• Water cycle

• Phosphorus cycle

Organisms that obtain energy by eating other organisms are known as what?

• Producers

• Decomposers

• Consumers

• Autotrophs

What is the variety of life in an ecosystem referred to as?

• Biomass

• Biodiversity

• Biome

• Biosphere

In a food web, what are organisms that break down dead organic material and recycle nutrients back into the ecosystem called?

• Producers

• Consumers

• Decomposers

• Herbivores

What is one major way humans impact the carbon cycle?

• Photosynthesis

• Respiration

• Combustion of fossil fuels

• Nitrogen fixation

What happens to biomass as you move up the trophic level?

• It increases

• It decreases

• It remains the same

• It fluctuates

In primary succession, which types of species usually colonize the area first?

• Climax species and secondary species

• Pioneer species and climax species

• Pioneer species and secondary species

• Secondary species and tertiary species