Early Eukaryotes

• Kingdom Protista– Most diverse Kingdom

• Polyphyletic

• Should be split into multiple Kingdoms

• Many have sexual reproduction

• Autotrophs and heterotrophs

Archaezoa

• Do not have mitochondria

• Similar to first Eukaryotes

• Example – Giardia

Rhizopoda

• Amoeba

• Move and feed by extending cytoplasmic projections– Pseudopods

• Heterotrophs

Actinopoda

• Thin pseudopods– Pseudopods controlled and supported by

microtubules

• Exoskeletons made of silica

• Heterotrophs

Euglenophyta

• Two flagella emerge from a pocket

• Some are both autotrophic and heterotrophic

• Example – Euglena

Ciliophora

• Cilia for movement and food gathering

• Paramecium, Stentor, Vorticella

• Some has sexual reproduction – Conjugation

Stramenopila

• Hair-like projection off flagella

• Often contain unusual chloroplasts

• Many are heterotrophs

• Examples– Diatoms – aquatic autotrophs– Water molds

Rhodophyta

• Alternation of generation (sexual reproduction)– Gametes do not have flagella

• Example– Red Algae

Chlorophyta

• Green algae

• Alternation of generation (sexual reproduction)– Gametes have flagella

• Can form large colonies

Slime molds

• Spores form amoeba-like cells

• Amoeba feed until food runs out

• Amoeba congregate and form multicellular “slug”

• “Slug” differentiates into fruiting body (sorocarp)

• Sorocarp forms spores