Homeostasis Keystone Review

What is a keystone species?

• A species that helps to hold an ecosystem together

• A species that lives in or around rocks

• Keys and stones have nothing to do with ecology

• A keystone isn't a living thing, it's just a stone

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The particular role (job) of an organism in its environment including types of food it eats, how it obtains its food and how it interacts with other organisms is called a what?

• niche
• habitat
• home
• ecosystem

The term biodiversity means:

• a wide variety of plants and animals in an ecosystem
• only a few types of plants and animals in an ecosystem
• an ecosystem composed mostly of plants
• an ecosystem composed mostly of animals

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A sea otter and a sea star are examples of...

• invasive species
• keystone species
• native species 
• symbiotic species

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A species that maintain biodiversity by keeping prey populations controlled are called...

• Introduced Species
• Apex Predators
• Invasive Species
• Keystone Species

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Which best describes what a food chain shows you?

• Energy flow through an ecosystem
• Food flowing through an ecosystem
• Consumers going into other consumers
• Who eats who

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Where does the energy start in this food chain?

• Plant
• Sun
• Deer
• Wolf

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What is the role of decomposers in a food chain?

• Use sunlight to make food
• Eat other organisms to gain energy
• Make the food for the whole food chain
• Break down dead organisms and add nutrients to the soil

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Which of these organisms would receive energy from the snake?

• Plant
• Rabbit
• Mouse
• Hawk

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Which type of consumer eats plants only?

• Herbivores
• Omnivores
• Carnivores
• Scavengers