Env. Sci. - Unit 2 Ecology review

Penguins, polar bears, seals, and fish living in the polar regions is an example of:

• Community

• Population

• Ecosystem

• Organism

Which of the following is NOT a biotic part of an ecosystem?

• Bacteria

• Soil

• Dead grass

• Mice

A colony of beetles would be defined as a

• Population

• Community

• Ecosystem

• Biome

This word will describe all the parts of an environment and all of the organisms living within it.

• Individuals

• Populations

• Ecosystems

• Communities

Carbon is normally taken out of the atmosphere by plants using this process...

• respiration

• decomposers

• nitrogen fixation

• photosynthesis

Humans will take carbon out of long term cycles through fossil fuels and burn them for fuel. What environmental issue does that cause?

• Ozone depletion

• Global warming

• deforestation

• habitat destruction

Photosynthesis is needed for which two biogeochemical cycles in their recycling process?

• Carbon and oxygen

• water and nitrogen

• water and oxygen

• carbon and nitrogen

A network of food chains representing the feeding relationships among the organisms in an ecosystem is

called a(n).

• Food chain

• Food Web

• Producers

• Consumers

This type of consumer is necessary in the ecosystem, having the niche of recycling nutrients, but is typically left off of an energy pyramid.

• Producers

• Consumers

• Decomposers

• Carnivores

This will describe the layer in the energy pyramid, or the feeding relationship structure in an ecosystem. 

• Heterotroph

• Autotroph

• Trophic Level 

• Producer