Unit test

If a scientist is studying how fish interact with water temperature in a lake, which field are they working in?

• Astronomy

• Ecology

• Physics

• Geology

Explain why the biosphere is considered the broadest level of ecological organization. Use evidence from the definitions provided.

• Because it includes only one ecosystem.

• Because it is the part of Earth where all life exists, encompassing all other levels.

• Because it refers to a single species.

• Because it only includes living components.

What is the role of a producer (autotroph) in an ecosystem?

• To eat other organisms for energy

• Capture energy from its surroundings to create food

• To provide shelter for consumers

• To decompose dead material

Which of the following best describes symbiosis?

• A relationship where both species are harmed

• A relationship in which two species live closely together

• A relationship where one species is killed for food

• A relationship where only one species benefits

Which of the following best describes the role of producers in an ecosystem?

• Producers create energy from the sun.

• Producers eat other consumers.

• Producers break down dead organisms.

• Producers hunt for food.

Which type of organism feeds only on plants?

• Carnivore

• Omnivore

• Herbivore

• Detritivore

Which organisms are included in Trophic level 1?

• Primary consumers (herbivores)

• Secondary consumers

• Producers (plants)

• Tertiary consumers

What is the role of secondary consumers in a food chain?

• They produce energy from the sun

• They eat primary consumers

• They eat producers directly

• They decompose dead organisms

Which of the following best describes the difference between population density and population distribution?

• Population density is about the number of individuals per unit area, while population distribution is about how individuals are spaced out.

• Population density is about how individuals are spaced out, while population distribution is about the number of individuals per unit area.

• Both terms mean the same thing.

• Population density refers to the number of species, while population distribution refers to the number of individuals.

What term describes the movement of individuals into an area occupied with an existing population?

• Immigration

• Emmigration

• Density-dependent factor

• Density-independent factor