IB Bio HL Topic 4.1 & 4.2 Review

What does a food web represent?

• All connections of energy flow throughout all organisms in a habitat.
• The specific ways that mutualism is carried out.
• A single pathway or energy flow between organisms. 
• How carnivores get their food. 

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What is the role of the snake in this food web?

• Primary consumer
• Secondary consumer
• Tertiary consumer
• Producer

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Whats the correct definition of a species?

• Species are organisms that share the same Genus

• Species are groups of organisms that live together in the same habitat

• Species are groups of organisms that can potentially interbreed to produce one generation of offspring.

• Species are groups of organisms that can potentially interbreed to produce fertile offspring.

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Which of the following is the best definition of a population?

• A group of individuals that can interbreed and produce fertile offspring
• The number of individuals of the same species in a given area
• Groups of species living and interacting with each other in a given area
• The total number of individuals in a given area

Which of the following is an autotroph?

• Carrots
• Birds
• Mice
• Grasshopper

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Why is only 10% of the energy passed along to the next trophic level?

• 90% is lost through heat, reproduction, and movement
• 90% is gained
• 90% is lost in light energy
• because only 10% is lost

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Lions are carnivores. How does carbon in a grass plant get into a lion?

• The lion is a carnivore who eats the grass

• Carbon from grass doesn't end up in a lion.

• The carbon ends up in the food the lion eats.

• The lion breathes in carbon given out by the plant

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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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Which organism contains the most energy?

• Rabbit
• Grains
• Birds
• Mice

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Cordyceps fungi secrete chemicals that break down their food then absorb nutrients. What is its mode of nutrition?

• Detritivore

• Saprotroph

• Autotroph

• Carnivore