AP Biology Population

Frogs lay ~4000 eggs at a time. Based on this frogs would be classified as -

• R-strategists

• K-strategists

Which of the following would be a density independent limiting factor?

• A virus spreading through a population

• A forest fire burning down a forest

• Birds competing for a limited amount of seeds

• A new predator moving to an area

Which of the following would be a density-dependent limiting factor?

• Two wolf packs having overlapping territories

• Pollution

• A flood

• Deforestation

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NGSS.MS-LS2-1

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What is a niche?

• A species that outcompetes others in an area

• The level on a food chain an organism occupies

• An organisms role in an ecosystem and the resources they obtain

• A species that disproportionately affects an ecosystem

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What will happen if two species occupy the same niche in an ecosystem?

• The ecosystem will be stressed and could collapse

• One species will either alter their niche or be eliminated

• The niche will expand to accommodate both species

• The species will share the niche

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How do invasive species impact ecosystems?

• The increase density dependent limiting factors

• They establish themselves as new keystone species in an area

• The open up new niches in the ecosystem

• They outcompete native species and overpopulate the area

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A herd of zebras would be considered a

• community

• species

• ecosystem

• population

Which of the following best explains why there are seldom more than five trophic levels in a food chain?

• Most carnivores function at more than one trophic level

• Trophic levels about this numbers contain too many individuals

• Energy is lost from each trophic level

• The ecosystem contains too much biomass

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The two species, Paramecium aurelia and Paramecium caudatum, which do not prey upon each other, fighting to grow in the same test tube is an example of which of the following?

• Competition

• Predation

• Emigration

• Immigration

__________ primary productivity is the total amount of energy that producers convert to chemical energy in organic molecules per unit of time.   

• Net

• Total

• Gross

• None of the above

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