AP®︎ Environmental Science: Topic 9.9 Practice Test
Prepare for your quiz, test, or the AP exam with focused practice questions on Topic 9.9 of AP Environmental Science – Endangered Species.
Questions List
Topic 9.9
Question 1 Easy
This question tests the following: EIN-4.B.1
What is an invasive species?
What You’re Being Tested On:
Explore the learning objectives taken directly from the College Board’s AP® Environmental Science 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 9.9: Endangered Species
Learning Objective: EIN-4.B
Explain how species become endangered and strategies to combat the problem.
Essential Knowledge: EIN-4.B.1
A variety of factors can lead to a species becoming threatened with extinction, such as being extensively hunted, having limited diet, being outcompeted by invasive species, or having specific and limited habitat requirements.
Essential Knowledge: EIN-4.B.2
Not all species will be in danger of extinction when exposed to the same changes in their ecosystem. Species that are able to adapt to changes in their environment or that are able to move to a new environment are less likely to face extinction.
Essential Knowledge: EIN-4.B.3
Selective pressures are any factors that change the behaviors and fitness of organisms within an environment.
Essential Knowledge: EIN-4.B.4
Species in a given ecosystem compete for resources like territory, food, mates, and habitat, and this competition may lead to endangerment or extinction.
Essential Knowledge: EIN-4.B.5
Strategies to protect animal populations include criminalizing poaching, protecting animal habitats, and legislation.