APES Units 1-4

Front

What is phase 4 of the demographic transition model?

Back

Phase 4 is characterized by low birth and death rates, leading to a stable population. Countries like Japan exemplify this phase.

Front

What is a Climax Community?

Back

A Climax Community is the stable, final stage of ecological succession, where the ecosystem reaches a balance after disturbances.

Front

What are the components of soil?

Back

Soil is made of weathered rocks and minerals, dead plants and animals, air, and water.

Front

What is the texture of soil that is 60% clay, 30% silt, and 10% sand?

Back

The texture is classified as clay.

Front

What gas makes up 78% of our atmosphere?

Back

Nitrogen.

Front

What is the significance of nitrogen in the atmosphere?

Back

Nitrogen is essential for plant growth and is a key component of amino acids and nucleic acids.

Front

Define ecological succession.

Back

Ecological succession is the process by which ecosystems change and develop over time, leading to a more stable community.

Front

What is the difference between primary and secondary succession?

Back

Primary succession occurs in lifeless areas, while secondary succession occurs in areas where a disturbance has destroyed an existing community.

Front

What role do keystone species play in an ecosystem?

Back

Keystone species have a disproportionately large impact on their environment relative to their abundance, helping to maintain the structure of the ecosystem.

Front

What is the role of pioneer species in ecological succession?

Back

Pioneer species are the first organisms to colonize previously disrupted or damaged ecosystems, initiating the process of succession.