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Biology Unit II: Food Chains and Webs
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Biology Unit II: Food Chains and Webs

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Questions and Answers

What is the primary energy source for most food chains?

  • Autotrophs
  • Herbivores
  • The sun or boiling-hot deep sea vents (correct)
  • Chemosynthetic bacteria

    • What is the term for organisms that make their own food from a primary energy source?

  • Omnivores
  • Autotrophs (correct)
  • Herbivores
  • Heterotrophs

    • What is the term for animals that eat herbivores?

  • Secondary consumers (correct)
  • Quaternary consumers
  • Primary consumers
  • Tertiary consumers

    • What is the sequence of who eats whom in a biological community?

    <p>Food chain</p> Signup and view all the answers

    What is the term for organisms that eat autotrophs?

    <p>Herbivores</p> Signup and view all the answers

    What is an example of a quaternary consumer?

    <p>Hawk that eats owls</p> Signup and view all the answers

    What is the ultimate energy source for all life on Earth?

    <p>Sunlight</p> Signup and view all the answers

    What type of organism must always be the first in a food chain?

    <p>Producer</p> Signup and view all the answers

    What happens to energy as it flows from organism to organism in a food chain?

    <p>It is lost at each step</p> Signup and view all the answers

    What is the term for animals that eat herbivores?

    <p>Carnivores</p> Signup and view all the answers

    What is the term for a network of many food chains?

    <p>Food web</p> Signup and view all the answers

    What is the term for organisms that make their own food from sunlight or chemical energy?

    <p>Autotrophs</p> Signup and view all the answers

    What happens to energy as we move from step to step in a chain or web?

    <p>It decreases</p> Signup and view all the answers

    What is the name given to organisms that eat both plants and animals?

    <p>Omnivores</p> Signup and view all the answers

    What is the role of detrivores in the ecosystem?

    <p>To break down dead organisms into simple nutrients</p> Signup and view all the answers

    Which organism is an example of a tertiary consumer?

    <p>Bear eating salmon</p> Signup and view all the answers

    What is the term for the different levels of energy transfer in a food chain or web?

    <p>Trophic levels</p> Signup and view all the answers

    What is the correct term for the first trophic level?

    <p>Primary producers</p> Signup and view all the answers

    What happens to the carnivore population when it becomes harder for them to find herbivores to eat?

    <p>It decreases</p> Signup and view all the answers

    What is the result of the balance between carnivores and herbivores?

    <p>Relatively stable equilibrium</p> Signup and view all the answers

    What is the relationship between plants and plant-eaters?

    <p>Similar equilibrium as carnivores and herbivores</p> Signup and view all the answers

    What is the purpose of the Food Chain Worksheet?

    <p>To complete food chains</p> Signup and view all the answers

    What is the format of the Food Chain Quiz?

    <p>Multiple choice comprehension questions</p> Signup and view all the answers

    What is the purpose of the Food Chain Trophic Levels worksheet?

    <p>To understand the concept of trophic levels</p> Signup and view all the answers

    What is the characteristic of secondary consumers?

    <p>They can be carnivores or omnivores</p> Signup and view all the answers

    What is the consequence of energy loss at each trophic level?

    <p>Each level has about 10% less energy available</p> Signup and view all the answers

    What is the relationship between trophic levels and organism numbers?

    <p>There are more autotrophs than heterotrophs</p> Signup and view all the answers

    What can happen if a species goes extinct?

    <p>It can have unpredictable consequences on the entire chain of species</p> Signup and view all the answers

    What is the role of decomposers in the ecosystem?

    <p>They feed on dead plants and animals and help recycle them</p> Signup and view all the answers

    What can be a result of an increase in carnivore population in a community?

    <p>The herbivore population decreases</p> Signup and view all the answers

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