Our planet is home to a huge variety of organisms.
Flashcards Ch 22 Notes Part I Introduction to Evolution

Flashcard
•
Science
•
9th Grade
•
Easy
Kelly Jones
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21 questions
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1.
FLASHCARD QUESTION
Front
Back
Scientists estimate 5-20 million species of organisms are alive today.
2.
FLASHCARD QUESTION
Front
Species have disappeared (gone extinct) due to various factors.
Back
These factors include environmental changes and human impact.
3.
FLASHCARD QUESTION
Front
EVOLUTION
Back
The process by which modern organisms have descended from ancient organisms. "Change over time."
4.
FLASHCARD QUESTION
Front
FITNESS
Back
Refers to traits and behaviors of organisms that enable them to survive and reproduce.
5.
FLASHCARD QUESTION
Front
Common Descent
Back
Species share a common ancestor.
6.
FLASHCARD QUESTION
Front
ADAPTATION
Back
Adaptations are based on variations that were randomly inherited. Mutations are the source of all variation, and adaptations increase an organism's fitness.
7.
FLASHCARD QUESTION
Front
Examples of adaptations in different organisms
Back
Examples of adaptations include camouflage in insects, thick fur in polar bears, and streamlined bodies in sharks.
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