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– 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– Protista

Many are only distantly related to each other.Many are more related to organisms in other kingdoms.

Difficult to classify because

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.