Food Chains, Food Webs, and Pyramids of Numbers (Leaving Cert Biology): Quizzes
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Practise the questions
12 questions from this quiz
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Practise the questions
12 questions from this quiz
What is a food chain?
What is a food chain?
A linear sequence showing energy flow
Which organisms are primary consumers?
Which organisms are primary consumers?
Herbivores
What percentage of energy is lost at each trophic level?
What percentage of energy is lost at each trophic level?
90%
How much energy passes from one trophic level to the next?
How much energy passes from one trophic level to the next?
About 10%
If grass contains 1000 energy units, how many reach a fox (secondary consumer)?
If grass contains 1000 energy units, how many reach a fox (secondary consumer)?
10 units
Why are food chains limited in length?
Why are food chains limited in length?
Significant energy loss at each level
What is a food web?
What is a food web?
Multiple interconnected food chains
What shape do pyramids of numbers typically show?
What shape do pyramids of numbers typically show?
Pyramid (decreasing upward)
Why do organism numbers decrease up the pyramid?
Why do organism numbers decrease up the pyramid?
Energy loss and larger organism size
What is an ecological niche?
What is an ecological niche?
An organism's functional role
Can two species with identical niches coexist long-term in the same habitat?
Can two species with identical niches coexist long-term in the same habitat?
No, they compete directly
How do bats and swallows avoid competition for flying insects?
How do bats and swallows avoid competition for flying insects?
Temporal partitioning (day vs night)