10 Questions
What does the prefix 'multi' mean in the term multicellular?
Many
How do multicellular organisms differ from unicellular organisms?
Size and complexity
What is the main function of specialization in multicellular organisms?
Specific roles for different cells
Which of the following is an example of a unicellular organism?
Bacteria
What is the role of red blood cells in multicellular organisms?
Specialized for oxygen transport
What is the largest category used in taxonomy to classify organisms based on cell type?
Domain
Which domain consists of unicellular prokaryotes?
Archaebacteria
What distinguishes multicellular autotrophs in kingdom Protista from those in kingdom Plantae?
Presence of chloroplasts
Which kingdom includes non-motile multicellular heterotrophs that gain food through extracellular digestion?
Fungi
What characteristic is shared by all animals and distinguishes them from plants?
Motility
Study Notes
Classification and Characteristics of Multicellular Organisms
- Organisms are classified using taxonomy, with the largest category being domain, based on cell type
- Three main domains: Eubacteria, Archaebacteria, Eukarya
- Eubacteria and archaebacteria are unicellular prokaryotes, Eukarya are more complex and basis of multicellular organisms
- Evolutionary relationships between domains determined through protein and ribosomal RNA patterns
- After domains, organisms sorted into Kingdom, Phylum, Class, Order, Family, Genus, Species
- Multicellular autotrophs belong to Plantae (contain chloroplasts for photosynthesis) and Protista (including kelp)
- Multicellular autotrophs in kingdom Protista and Plantae differ in specialized cells, such as chloroplasts
- Multicellular heterotrophs are in Animalia (motile, must eat for energy) and Fungi (non-motile, gain food through extracellular digestion)
- Multicellular organisms have specialized cells, communication systems, transport systems, eukaryotic cells, and increase in size with cell number
- All plants are multicellular autotrophs, immotile, with specialized tissues and organs for communication and transportation
- All animals are multicellular, motile, and heterotrophic, requiring food for energy
- Examples of multicellular organisms include trees, grass, animals like fish and cheetahs, and fungi like mushrooms
Test your knowledge of the classification and characteristics of multicellular organisms in this quiz. Explore taxonomy, domains, evolutionary relationships, specialized cells, and the differences between multicellular autotrophs and heterotrophs. Gain insights into the diverse world of plants, animals, and fungi as you dive into this quiz.
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