APES Ecosystems & Biodiversity

Question 1

Which term describes the variety of life across all levels of ecological organization?

Accepted Answer

Biodiversity

Answer

Productivity

Answer

Biomass

Answer

Succession

Question 2

What is a keystone species?

Accepted Answer

A species with a critical ecosystem role

Answer

An organism that is always endangered

Answer

A species that is the most numerous

Answer

A recently discovered species

Question 3

Which process is responsible for converting atmospheric nitrogen into a usable form for plants?

Accepted Answer

Nitrogen fixation

Answer

Photosynthesis

Answer

Respiration

Answer

Decomposition

Question 4

What typically happens to energy as it flows through a food chain?

Accepted Answer

It decreases at each trophic level

Answer

It increases at higher levels

Answer

It is stored indefinitely

Answer

It is recycled back to producers

Question 5

Which type of ecosystem has the highest biodiversity?

Accepted Answer

Tropical rainforest

Answer

Tundra

Answer

Desert

Answer

Temperate forest

Question 6

What is ecological succession?

Accepted Answer

Gradual change in ecosystem communities

Answer

Migration of animals

Answer

Climatic change

Answer

Seasonal reproduction