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Directed Reading

Directed Reading. SECTION 13.1: “THE THEORY OF EVOLUTION BY NATURAL SELECTION. 1 . Some individuals of a population or species are better suited to ___. b: survive & reproduce. 2 . Charles Darwin is credited with the theory of ___. a: evolution by natural selection.

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  1. Directed Reading SECTION 13.1: “THE THEORY OF EVOLUTION BY NATURAL SELECTION

  2. 1. Some individuals of a population or species are better suited to ___. b: survive & reproduce

  3. 2. Charles Darwin is credited with the theory of ___. a: evolution by natural selection

  4. 3. In science, evolution is referred to as ___. c: change over time

  5. 4. Darwin learned that there were resemblances between the plants and animals of South America and ___. b: the Galápagos Islands

  6. 5. What was the mechanism for evolution proposed by Jean Baptiste Lamarck? • Lamarck proposed that during an individual’s lifetime, structures increase or decrease in size according to their use. These acquired traits are then passed on to the offspring.

  7. 6. Explain how the terms population & species differ in meaning. • A species is a group of genetically similar organisms that can interbreed and produce fertile offspring. A population is a group of organisms of the same species living in a given place at the same time.

  8. 7. Explain how the terms adaptation &natural selection differ in meaning. • Adaptation is the changing of a species to become better suited to its environment. Natural selection is the process by which populations change in response to their environment. Adaptation occurs as a result of natural selection.

  9. 8. Traits of individuals best suited to survive will become [more / less] common in each new generation. • more

  10. 9. [Genes / Natural selection] is (are) responsible for inherited traits. • Genes

  11. 10. [Natural selection / Genes] cause(s) the frequency of certain alleles in a population to vary over time. • Natural selection

  12. 11. [Isolation / Extinction] is the condition in which two populations of the same species cannot breed with one another. • Isolation

  13. 12. Generally, when the individuals of two related populations can no longerbreed with one another, the two populations are considered to be different [organisms / species]. • species

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