APES Semester Exam Review

Front

What is the average efficiency of energy transfer between trophic levels?

Back

Approximately 10 percent.

Front

What happens to biodiversity when a top predator is removed from an ecosystem?

Back

A trophic cascade can affect the entire food web, causing some organisms to decrease and others to grow rapidly.

Front

Which organisms have the most energy available in an energy pyramid?

Back

Producers.

Front

What can be used to assess the biological diversity of an area?

Back

Genetic variation within each species and the number of species present.

Front

What is the zone where a stable healthy population survives?

Back

Optimal range.

Front

Define 'trophic cascade'.

Back

A series of changes in the population sizes of organisms at different trophic levels in an ecosystem, often triggered by the removal or addition of a top predator.

Front

What are producers in an ecosystem?

Back

Organisms that produce energy through photosynthesis or chemosynthesis, forming the base of the food web.

Front

What is the difference between r-strategists and K-strategists?

Back

R-strategists reproduce quickly and in large numbers, while K-strategists invest more in fewer offspring and have longer lifespans.

Front

What is biological diversity?

Back

The variety of life in a particular habitat or ecosystem, including the number of species and genetic variation.

Front

What is the significance of genetic variation in a population?

Back

It enhances the ability of a population to adapt to changing environments and resist diseases.