Biology Semester 1 Final Review

Front

What happens to the population of willow trees as the elk decrease?

Back

The population of willow trees increases.

Front

What is an example of an abiotic factor in an ocean ecosystem?

Back

Water.

Front

Describe the relationship between the populations of lynx and hare over time.

Back

When the hare population increases, the lynx population increases, and when the hare population decreases, so does the lynx.

Front

Which animal is considered the apex predator?

Back

Hawk.

Front

What is the efficiency of energy transfer from one trophic level to the next?

Back

Roughly 10%.

Front

Define 'abiotic factors' in an ecosystem.

Back

Non-living chemical and physical parts of the environment that affect living organisms.

Front

What is a trophic level?

Back

A trophic level is the position an organism occupies in a food chain.

Front

Explain the concept of an ecosystem.

Back

An ecosystem is a community of living organisms and their physical environment interacting as a system.

Front

What role do producers play in an ecosystem?

Back

Producers convert solar energy into chemical energy through photosynthesis.

Front

What is the significance of an apex predator in an ecosystem?

Back

Apex predators help maintain the balance of ecosystems by controlling the populations of other species.