College Biology Ch 35

Which organism eats only plant foods?

• herbivore

• omnivore

• decomposer

• carnivore

• autotroph

A disruption in which biogeochemical cycle will lead to cultural eutrophication?

• hydrological

• carbon

• nitrogen

• phosphorus

Which of the following organisms would be considered a decomposer?

• bird

• caterpillar

• mushroom

• green plant

• green algae

Which kind of organism would be most likely to perform photosynthesis?

• autotroph

• decomposer

• omnivore

• carnivore

• herbivore

An ecosystem consists of what two components?

• grazing and detritus food chains

• trophic and eutrophic factors

• habitat and niches

• biotic and abiotic factors

• water and temperature

Which of the following is a biotic factor in an ecosystem?

• water availability

• sunlight

• trees

• inorganic nutrients

• temperature

Which of the following is comprised of a community of organisms, plus its physical environment?

• trophic level

• niche

• ecosystem

• food chain

• habitat

Which statement about the hydrologic cycle is accurate?

• Once water sinks into the ground, it is safe from human exploitation or pollution until it has rejoined the ocean.

• Some water evaporates from land and from plants.

• The cycle demonstrates that it is impossible to run out of fresh water for human use.

• All water molecules that evaporate from the ocean precipitate on land and move by gravity through groundwater to the ocean again.

• The main source of water in the atmosphere is from evaporation over landmasses.

The ultimate source of energy for the majority of organisms on Earth, including humans, is

• ultraviolet light.

• heat from burning fuels.

• electric light.

• heat from muscle contraction.

• sunlight.

The primary producers in an ecosystems are also called

• heterotrophs.

• herbivores.

• carnivores.

• consumers.

• autotrophs.