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MCAS Review Evolution. Lynn English High School Ms. Mezzetti. MA Standard 5: Evolution and Biodiversity.

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mcas review evolution

MCAS ReviewEvolution

Lynn English High School

Ms. Mezzetti

ma standard 5 evolution and biodiversity
MA Standard 5: Evolution and Biodiversity

Central Concepts: Evolution is the result of genetic changes that occur in constantly changing environments. Over many generations, changes in the genetic make-up of populations may affect biodiversity through speciation and extinction.


5.1 Explain how evolution is demonstrated by evidence from the fossil record, comparative anatomy, genetics, molecular biology, and examples of natural selection.

  • Fossils: Remains of plants and animals embedded in rock.
  • The Fossil record shows definite changes over time
5 1 evidence for evolution
5.1 Evidence for evolution
  • Comparative Anatomy
  • In organisms, analogous structures are similar in function but have different evolutionary origins.
  • Homologous structureshave a common evolutionary origin.




Genetic variation contributes to evolution

  • Molecular biology: Scientists today study proteins and molecules such as DNA to find evolutionary relationships
5 2 describe species as reproductively distinct groups of organisms
5.2 Describe species as reproductively distinct groups of organisms.
  • Species: An individual belonging to a group of organismsare capable of mating with one another to produce fertile offspring.

5.2: Recognize that species are further classified into a hierarchical taxonomic system based on morphological, behavioral, and molecular similarities.

5 3 describe the role that geographic isolation can play in speciation
5.3: Describe the role that geographic isolation can play in speciation.

Geographic isolation is a term that refers to a population of animals, plants, or other organisms that are separated from exchanging genetic material with other organisms of the same species


5.3: Explain how evolution through natural selection can result in changes in biodiversity through the increase or decrease of genetic diversity within a population.