

Ap Biology Unit 8 Review
Flashcard
•
Biology
•
11th Grade
•
Practice Problem
•
Hard
Wayground Content
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15 questions
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1.
FLASHCARD QUESTION
Front
What is the energy transfer efficiency from producers to secondary consumers in an ecosystem?
Back
Typically, only about 10% of the energy is transferred from one trophic level to the next. If producers have 750,000 J, secondary consumers would receive approximately 7,500 J.
2.
FLASHCARD QUESTION
Front
What role do decomposers play in an ecosystem?
Back
Decomposers recycle essential nutrients back to producers, enrich soil with nitrogen, and help keep ecosystems clean.
3.
FLASHCARD QUESTION
Front
What characterizes R-strategists in terms of reproduction?
Back
R-strategists, like frogs, produce a large number of offspring (e.g., ~4000 eggs) with little parental care.
4.
FLASHCARD QUESTION
Front
What is a keystone species?
Back
A keystone species is a species that has a disproportionately large effect on its environment relative to its abundance.
5.
FLASHCARD QUESTION
Front
What is a trophic cascade?
Back
A trophic cascade occurs when changes at one trophic level cause ripple effects throughout the food web.
6.
FLASHCARD QUESTION
Front
What happens when a keystone species is removed from an ecosystem?
Back
The removal of a keystone species can lead to significant changes in the ecosystem, often resulting in a decline in biodiversity.
7.
FLASHCARD QUESTION
Front
What is the difference between R-strategists and K-strategists?
Back
R-strategists produce many offspring with low survival rates, while K-strategists produce fewer offspring with higher survival rates.
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