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Vocabulary Words

Vocabulary Words. E volution. process through which species change over time. Abiotic. Nonliving factors in an organism’s environment ex. Temperature, rainfall, sunlight. Biotic. living factors in an ecosystem. Ex. Trees, insects, grass. Adaptation.

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Vocabulary Words

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  1. Vocabulary Words

  2. Evolution • process through which species change over time.

  3. Abiotic • Nonliving factors in an organism’s environment • ex. Temperature, rainfall, sunlight

  4. Biotic • living factors in an ecosystem. • Ex. Trees, insects, grass

  5. Adaptation • A characteristic or any inherited trait that makes a species better suited to survive and reproduce in its environment

  6. Habitat Natural environment in which a living thing gets all that it needs to live Ex. Deserts, rainforest, coral reef, lake

  7. Natural Selection • The process through which members of a species that are best suited to their environment survive and reproduce at a higher rate than other members of their species.

  8. Mass Extinction • One of several periods in Earth’s history when large numbers of species became extinct at basically the same time.

  9. Population • A group of organisms of the same species.

  10. Succession • A natural process that involves a gradual change in the plant and animal communities that live there.

  11. Vestigial Organ • a physical structure that was fully developed and functional in an earlier group of organisms but is reduced and unused in later species.

  12. Speciation • The evolution of a new species from an existing one

  13. Mutation • A change in an organism’s DNA

  14. Ancestor • A distant or early form of an organisms from which later forms descend

  15. Fossil • The imprint or hardened remains of a plant or animal that lived long ago

  16. Limiting Factor • Factor or condition that prevents the continuing growth of a population in an ecosystem

  17. Isolation • Separation of a population of organisms from related forms in such a manner to prevent crossbreeding

  18. Extinction • The permanent disappearance of a species

  19. Population Dynamics • The study of the changes in the number of individuals in a population and the factors that affect those changes

  20. Carrying Capacity • Maximum number of a species that an ecosystem can support

  21. Population density • Measure of the number of organisms that live in a given area • Ex. 15 rabbits per sq km

  22. Population Size • Number of individuals of the same species that live in a given area

  23. Immigration • Movement of an organism into a range inhabited by individuals of the same species

  24. Emigration • Movement of individuals out of an ecosystem

  25. Opportunists • Species characterized by a relatively short life span, with relatively large numbers of offspring

  26. Competitor • A species characterized by a relatively longer life span, with relatively few offspring, when compared with an opportunist species.

  27. Pollution • The release of harmful substances into the air, water, or land.

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