Ecology Test Review

Select all Abiotic factors that contribute to an ecosystem. (Select ALL that apply)

• Soil

• Wind

• Trees

• Sunlight

• Air

Select all Biotic factors that contribute to an ecosystem. (Select ALL that apply)

• Insects

• Wind

• Trees

• Sunlight

• Birds

A type of relationship between organisms where both organisms benefit.

• Mutualism

• Parasitism

• Commensalism

• Jainism

As you increase in trophic levels

• Only 10% of the energy is passed on

• There are more organisms

• Energy increases

• All of the above

Which trophic level has the most energy?

• Producers

• Primary consumers (herbivores)

• Secondary consumers (carnivores)

• Tertiary consumers (top carnivores)

Which trophic level has the lowest population?

• Producers

• Primary consumers (herbivores)

• Secondary consumers (carnivores)

• Tertiary consumers (top carnivores)

Why are decomposers an essential part of any ecosystem?

• They recycle nutrients back into the food web

• They are the most efficient producers

• Without them primary consumers population would drastically increase

• All of the above

Humans have a large effect on ecosystems.

• True

• False

What do the arrows mean?

• Ecosystem

• Energy

• Decomposer

• Survive

What is an ecosystem?

• A group of animals that are the same species.
• Soil, water, air and sunlight
• All the living and non living things that interact in an area.
• North America