AP Biology Unit 8 Vocabulary Quiz

Which of the following best describes the role of a keystone species in an ecosystem?

• A species that is the most abundant in the ecosystem

• A species that has a disproportionately large impact on its environment relative to its abundance

• A species that is at the top of the food chain

• A species that is the primary producer in the ecosystem

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What is the primary function of the Calvin cycle in photosynthesis?

• To capture light energy

• To produce ATP and NADPH

• To fix carbon dioxide into organic molecules

• To release oxygen as a byproduct

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Which of the following processes is an example of a positive feedback loop in biological systems?

• Regulation of blood glucose levels

• Blood clotting

• Thermoregulation

• Osmoregulation

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In the context of population ecology, what does the term "carrying capacity" refer to?

• The maximum number of individuals that an environment can support sustainably

• The number of offspring an individual can produce in a lifetime

• The rate at which a population increases in size

• The total biomass of a population

Which of the following is a characteristic of r-selected species?

• Long lifespan

• High parental care

• Large number of offspring

• Stable population size

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What is the main purpose of cellular respiration in eukaryotic cells?

• To convert light energy into chemical energy

• To produce glucose from carbon dioxide and water

• To generate ATP by breaking down glucose

• To synthesize proteins from amino acids

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Which of the following best describes the process of ecological succession?

• The gradual change in species composition of a given area

• The movement of individuals from one population to another

• The cyclical changes in population size over time

• The adaptation of species to their environment

What is the role of decomposers in an ecosystem?

• To produce energy through photosynthesis

• To break down dead organic matter and recycle nutrients

• To compete with primary consumers for resources

• To provide shelter for other organisms

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Which of the following is an example of mutualism?

• A lion hunting a zebra

• A bee pollinating a flower

• A tapeworm living in the intestines of a mammal

• A bird building a nest in a tree

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What is the primary function of stomata in plant leaves?

• To absorb water from the soil

• To transport nutrients throughout the plant

• To facilitate gas exchange

• To store energy in the form of starch

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