Ecology Unit test review

Front

What is the ultimate source of energy for most ecosystems?

Back

The sun.

Front

What is a pioneer species?

Back

The first plant species to inhabit new land.

Front

Why are decomposers important in maintaining stability in an ecosystem?

Back

Decomposers recycle nutrients needed by producers (plants).

Front

What is the 'Green world hypothesis'?

Back

The 'green world hypothesis' states that the world is kept green by keystone predators that keep the herbivores in check.

Front

What type of growth curve is 'B'?

Back

Logistic growth.

Front

Define an ecosystem.

Back

An ecosystem is a community of living organisms interacting with their physical environment.

Front

What role do producers play in an ecosystem?

Back

Producers convert solar energy into chemical energy through photosynthesis.

Front

What is the difference between biotic and abiotic factors?

Back

Biotic factors are living components of an ecosystem, while abiotic factors are non-living components.

Front

What is carrying capacity?

Back

Carrying capacity is the maximum number of individuals of a species that an environment can support sustainably.

Front

Explain the concept of food chains and food webs.

Back

Food chains show a linear path of energy flow, while food webs illustrate the interconnected feeding relationships among various organisms.