Unit 6: Ecology

Relationship in which two species live closely together

• resource
• mutualism
• succession
• symbiosis

Put the levels of organization in order from smallest to largest:

• Population, organism, ecosystem, biosphere, community

• Ecosystem, population, organism, community, biosphere

• Organism, population, ecosystem, biosphere, community

• Organism, population, community, ecosystem, biosphere

Which item would be classified as an "abiotic factor" in an ecosystem?

• Bird

• Fungi

• Ant

• Rock

What is a symbiotic relationship where one organism benefits and the other organism is harmed?

• Parasitism

• Commensalism

• Mutualism

• Competition

After a volcanic eruption, lava covers the land. What is the order that plants grow to repopulate the area?

• Lichens → Shrubs → Grasses → Trees

• Lichens → tree → shrubs→Grasses

• Grasses → Lichens → Shrubs → Trees

• Lichens → Grasses → Shrubs → Trees

As you move upward, from level to level, in an energy pyramid, energy _____.

• increases
• decreases
• stays the same
• increases exponentially

Which of the following best describes the relationship between biodiversity

and stability of ecosystem?

• Increased biodiversity increases the stability of an ecosystem.

• As biodiversity increases, stability of the ecosystem decreases.

• A less diverse ecosystem keeps more resources in the ecosytem.

• An ecosystem with low biodiversity is better able to recover from natural disasters.

Secondary Succession on land always begin when _______ is still available.

• Rock

• Dirt

• Water

• Wind

The cutting down of trees on a large scale in Brazil is an example of ______.

• Carbon-oxygen cycle

• Erosion

• Deforrestation

• Grazing

Global warming can lead to...?

• deforestation

• climate change

• oil spills

• litter