Unit 2 Test Review

Front

What do the arrows in a food chain or web represent?

Back

They show what direction the energy is flowing between organisms.

Front

What is carrying capacity in an ecosystem?

Back

The maximum population size that an environment can sustain, which is 1000 in this context.

Front

How much energy is typically available to be passed on to the next trophic level in an ecosystem?

Back

10%.

Front

What type of growth occurs as resources become less available, causing population growth to slow or stop?

Back

Logistic growth.

Front

Which organisms carry out each process in the nitrogen cycle?

Back

Bacteria.

Front

Define 'trophic level' in an ecosystem.

Back

A trophic level is a position in a food chain or web, representing the flow of energy and nutrients.

Front

What is the primary source of energy for most ecosystems?

Back

The sun.

Front

Explain the concept of 'biomass' in an ecosystem.

Back

Biomass refers to the total mass of living matter within a given area or volume.

Front

What is the difference between 'exponential growth' and 'logistic growth'?

Back

Exponential growth occurs when resources are unlimited, while logistic growth occurs when resources are limited.

Front

What role do decomposers play in an ecosystem?

Back

Decomposers break down dead organic matter, recycling nutrients back into the ecosystem.