Unit 1 Ecology

A group of organisms of the same species that live in the same area is called a(n)

• organism

• population

• community

• ecosystem

Herbivores are which of the following?

• producer

• primary consumer

• secondary consumer

• tertiary consumer

Which of the following provide most of the energy in ecosystems?

• keystone species

• carnivores

• generalist

• producers

An organism that has an unusually large effect on an ecosystem is called a(n)

• keystone species

• omnivore

• biotic factor

• heterotroph

Which two processes in the carbon cycle are also parts of the oxygen cycle?

• combustion

• photosynthesis

• respiration

• decay

Which process is part of the hydrologic cycle?

• nitrification

• transpiration

• decomposition

• sedimentation

Which of the following can be both primary and secondary consumers?

• producers

• herbivores

• carnivore

• omnivore

Bacteria are important in the nitrogen cycle because they

• convert nitrogen

• respire returning carbon dioxide to the atmosphere

• decay to form fossil fuels

• produce sugars

What are two processes by which autotrophs make food?

• decomposition

• photosynthesis

• respiration

• chemosynthesis

If a keystone species is removed from an ecosystem,

• biotic factors are effected

• abiotic factors are effected

• biotic AND abiotic factors are effected

• No factors are effected