Ecology

Members of a species in a defined area

• Ecosystem
• community
• biodiversity
• population

Organisms that relies on other organisms for food; consumer

• herbivore
• decomposer
• heterotroph
• species

All the organisms in a particular location, including their nonliving environment

• ecosystem
• carnivore
• niche
• population

What may happen if the snowshoe hare was removed from the food web pictured?

• The insects in the habitat would increase.
• The shrew population would decrease due to being only hawk food source.
• The willow tree population would decrease.
• Foxes would dies due to no food source. 

Which of the following leads to a decrease in biodiversity?

• protection of ecosystems
• pollution control
• selective cutting
• introduction of exotic or invasive species

In the food web shown, the snail would be considered...

• primary consumer
• secondary consumer
• tertiary consumer
• producer

Which are two ways a population can decrease in size?

• immigration and emigration

• increased death rate and immigration

• decreased birthrate and emigration

• emigration and increased birthrate

Each of the following is a density-dependent limiting factor EXCEPT

• competition

• temperature

• crowding

• disease

Which of the following is a density-independent limiting factor?

• earthquake

• disease

• emigration

• parasitism

For most populations that are growing, as resources start to become less available, the population

• declines rapidly

• increases more rapidly

• reaches carrying capacity

• enters a phase of exponential growth