Transcript Chapter 19 Protists

Chapter 19 Protists
KEY CONCEPT
Kingdom Protista is the most diverse of all the
kingdoms.
Chapter 19 Protists
19.1 DIVERSITY OF PROTISTS
Chapter 19 Protists
Protists can be animal-like, plantlike, or funguslike.
• Protists: Eukaryotes that are not animals,
plants, or fungi
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–
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members of the Protista Kingdom
single celled or multicellular
microscopic or very large
reproduce asexually and/or sexually
Chapter 19 Protists
Protists can be animal-like, plantlike, or funguslike.
• Protist are generally divided into three groups
based on how they get their food:
– Animal-like (consume other organisms)
– Plantlike (make own food)
– Funguslike (decompose other organisms)
Chapter 19 Protists
• Animal-like protists consume other organisms.
– heterotrophs
– single-celled
– Not animals because animals are multicellular and
animal like protist are single-celled
Chapter 19 Protists
• Plantlike protists are Make their own food through
photosynthesis (autotroph).
– single-celled, colonial (live together in colonies), or
multicellular (kelp)
– Not plants because they have no roots, stems, or leaves
Chapter 19 Protists
• Funguslike protists decompose dead organisms.
– Heterotrophs.
– can move at some point in their life cycle whereas fungi
cannot.
Chapter 19 Protists
Chapter 19 Protists
Protists are difficult to classify.
• Four of the six Kingdoms are Eukaryotes
– Plant
– Animal
– Fungus
Difficult to classify because
Many are only
distantly related to
– Protista
each other.
Many are more
related to organisms in
other kingdoms.
Chapter 19 Protists
Protists are difficult to classify.
• Protista is often called the junk drawer of the kingdoms.
– Eukaryotes that do not fit into any other kingdom:
- Animal like but not quite an animal
- Plantlike but not quite a plant
- Funguslike but not quite a fungus
Chapter 19 Protists
• Protist classification will likely change.
– Some protists are not closely related.
– Molecular evidence supports reclassification.