AP®︎ Biology: Topic 8.7 Practice Test
Prepare for your quiz, test, or the AP exam with focused practice questions on Topic 8.7 of AP Biology – Disruptions in Ecosystems.
Questions List
Topic 8.7
Question 1 Easy
This question tests the following: EVO-1.O.1
What term describes a genetic variation that provides an advantage in a specific environment?
What You’re Being Tested On:
Explore the learning objectives taken directly from the College Board’s AP® Biology Curriculum. Ensure you’re prepared for the exact topics covered on the AP® exam, in-class tests, and quizzes, and gain confidence in your mastery of the material.
Topic 8.7: Disruptions in Ecosystems
Learning Objective: 8.7.A
Explain the interaction between the environment and random or preexisting variations in populations.
Essential Knowledge: 8.7.A.1
An adaptation is a genetic variation that is favored by selection and manifests as a trait that provides an advantage to an organism in a particular environment.
Essential Knowledge: 8.7.A.2
Heterozygote advantage is when the heterozygous genotype has a higher relative fitness than either the homozygous dominant or homozygous recessive genotype.
Essential Knowledge: 8.7.A.3
Mutations are not directed by specific environmental pressures.
Learning Objective: 8.7.B
Explain how invasive species affect ecosystem dynamics.
Essential Knowledge: 8.7.B.1
The intentional or unintentional introduction of an invasive species can allow the species to exploit a new niche free of predators or competitors or to outcompete native species for resources. Illustrative examples: Kudzu; Zebra mussels.
Learning Objective: 8.7.C
Describe human activities that lead to changes in ecosystem structure and dynamics.
Essential Knowledge: 8.7.C.1
Human impact accelerates changes at local and global levels. These activities can drive changes in ecosystems, such as the following, that cause extinctions to occur: i. Biomagnification ii. Eutrophication. Illustrative examples: Dutch elm disease; Potato blight.
Learning Objective: 8.7.D
Explain how geological and meteorological activity leads to changes in ecosystem structure and dynamics.
Essential Knowledge: 8.7.D.1
Geological and meteorological events affect habitat change and ecosystem distribution. Biogeographical studies illustrate these changes. Illustrative examples: Global climate change; Logging; Urbanization; Monocropping; El Niño; Continental drift; Meteor impact on dinosaurs.
