PI Review

Front

What is a density-dependent limiting factor?

Back

A factor that affects a population's growth in a way that depends on the population density, such as disease or competition for resources.

Front

Give an example of a density-dependent limiting factor in a forest ecosystem.

Back

A disease causes the death of many animals in the forest.

Front

What is secondary succession?

Back

A process that reestablishes a previously colonized, but disturbed or damaged habitat.

Front

What type of vegetation is most likely to support large herbivores and carnivores during secondary succession?

Back

Seedlings and bushes.

Front

What happens to a saltwater fish placed in a freshwater aquarium?

Back

The fish experiences osmotic pressure, leading to swelling and likely death due to being in a hypotonic solution.

Front

What is the relationship between genetic variation and adaptation?

Back

Genetic variation is essential for natural selection to occur, allowing certain traits to become adaptations in a species.

Front

What is natural selection?

Back

The process by which organisms better adapted to their environment tend to survive and produce more offspring.

Front

Why does biomass decrease as trophic levels increase in a food pyramid?

Back

Some energy is lost as heat, and toxic chemicals can accumulate, leading to lower biomass at higher trophic levels.

Front

What is a food web?

Back

A complex network of feeding relationships among various organisms in an ecosystem.

Front

Define trophic level.

Back

Each step in a food chain or food web, representing the flow of energy and nutrients.