Course 2 Topic 5 Populations, Communities, and Ecosystems

Animals or plants that both need a limited supply of resources, mates, and territories.

• competition

• niche

• population

• predation

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Members of the same species helping each other to meet their needs.

• Cooperation
• Competition
• Niche

• Host

A ranking system established by some animals to ensure that all labor and resources are shared.

• niche

• cooperation

• competition

• social hierarchy

Areas established to make sure members of a population have an adequate habitat to provide basic resources.

• niches

• social hierarchy

• territories

• competition

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All the trees, grass, dogs, deer, birds, and humans that live in Bristol, CT are a.........

• ecosystem

• abiotic factors

• social hierarchy

• community

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What type of symbiosis exists between barnacles and whales? Barnacles get protection and help finding food, while the whale is unaffected.

• commensalism

• mutualism

• parasitism

• predation

What type of symbiosis exists between mistletoe and the trees they grow in? The mistletoe takes water and nutrients from the trees branches, without having to have roots of its own.

• predation

• mutualism

• commensalism

• parasitism

The organism that benefits in a parasitism symbiosis.

• host

• the one harmed

• invasive species

• parasite

The role a living thing plays in nature and how it survives.

• colonize

• parasite

• habitat

• niche

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This refers to the variety of different species within an ecosystem.

• biodiversity

• limiting factor

• natural resource

• carrying capacity

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