Unit 1 Exam (E.S.)

Consumers are classified as ________ because they are unable to make their own food.

• Autotrophs

• Omnivores

• Heterotrophs

• Carnivores

The birds, insects, plants, fungi, and other organisms that reside in a nearby wetland.

• Organism

• Population

• Molecules

• Biological community

The main factor that determines what type of plants grow in a biome is

• Temperature

• Precipitation

• Altitude

• Both temperature and precipitation

• Both temperature and altitude

All of life on Earth exists in

• A single ecosystem

• A single biome

• Biosphere

• Hydrosphere

An example of a population is

• All trees in the forest

• All maple trees in the forest

• All animals in the forest

At each stage of the trophic levels, how much energy is lost?

• 10%

• 90%

• 99%

Which of the following is correctly arranged from the lowest trophic level to the highest trophic level?

• Bacteria, frog, eagle, hawk

• Algae, deer, wolf, hawk

• Grass, mouse, snake, eagle

When an ecosystem contains many different species, there are usually a high number of links in its food web. How does this affect the sustainability of the ecosystem?

• Typically, if one link in the food web is added, the ecosystem will change its location.

• Typically, if one link in the food web is removed, the ecosystem will no longer exist.

• Typically, if one link in the food web is removed, the ecosystem will remain stable.

• Typically, if one link in the food web is added, the ecosystem will destabilize.

Which is an abiotic factor?

• a forest of deciduous trees

• a polar bear on ice

• an ocean current of cold water

• fungi and moss on a rotting log

Which is an autotroph?

• algae

• mushroom

• sparrow

• wolf