Ecosystems and Species Diversity
9th GradeScience60 min
Learning Objective
I can explain how different factors affect species diversity in an ecosystem.
Lesson Flow
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Guided Notes
Key concepts students will learn:
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Organisms are considered to be the same species if they can interbreed and their offspring can reproduce.
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Allopatric speciation occurs when a geographic barrier separates populations, while sympatric speciation occurs in the same area due to other isolating factors.
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Prezygotic barriers prevent the formation of a zygote, while postzygotic barriers occur after the zygote is formed, such as when offspring are infertile or do not survive.
Practice
12 questions • Multiple choice & Short answer
Exit Ticket
“Describe two different factors that can isolate populations, potentially leading to the formation of new species.”
Teacher Guide
Get the complete package:
- Answer keys for all questions
- Differentiation strategies
- Extension activities
- Printable student handouts
