Biodiversity and Classification


Lesson 3
Kingdom Protoctista

You likely knew them as protists, but in this third Biodiversity and Classification lesson, students will learn that there’s more than single-cell organisms in the newly named Kingdom Protoctista.

Student Objectives

  • List characteristics of protoctists that distinguish them from other organisms
  • Compare and contrast protoctists, and classify them into groups according to such characteristics as the ways they obtain energy
  • Give reasons why many scientists think that such cell organelles as mitochondria and chloroplasts in modern eukaryotic cells developed from early prokaryotes
  • Compare and contrast protozoa; give examples of common protozoa, and classify them into groups according to their methods of locomotion
  • Explain why Euglena is difficult to classify
  • Identify a major basis for algae classification and give examples of common algae types
  • Explain why seaweed is important both nutritionally and economically
  • Explain why diatoms are economically important
  • Relate dinoflagellates to red tide and describe beneficial and harmful impacts of red tides
  • Relate bioluminescent levels in dinoflagellates to the health of a marine environment
  • Describe the basic form and function of a slime mold in the plasmodial and reproductive stages of its life cycle
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