Protists

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Forams - have porous shells called tests

20 µm

Slide 9

Volvox - colonial freshwater chlorophytes

20 µm

50 µm

Slide 10

Amoeba - have pseudopods for ingestion and motility

100 µm

Slide 11

Trichomonas vaginali Parabasalids that commonly inhabit the female vagina

5 µm

Flagella

Undulating membrane

Slide 12

Euglenozoans

Euglenozoa is a diverse clade that includes predatory heterotrophs, photosynthetic autotrophs, and pathogenic parasites.

The main feature distinguishing them as a clade is a spiral or crystalline rod of unknown function inside their flagella.

This clade includes the kinetoplastids and euglenids.

Slide 13

Euglenozoans

Flagella

Crystalline rod

inside flagella

Ring of microtubules

0.2 µm

Slide 14

Trypannnosoma - the Kinetoplastid that causes Sleeping Sickness

9 µm

Slide 15

Euglenids can be both autotrophic and heterotrophic

Long flagellum

Eyespot

Short flagellum

Contractile vacuole

osmoregulation

Nucleus

Chloroplast

Plasma membrane

Light detector

Adaptation for

photosynthesis

Pellicle

Protein bands beneath

plasma membrane

Provide strength and

Flexibility.

Euglena (LM)

5 µm

Slide 16

Dinoflagellates some are bioluminescent /cause “Red Tides”

Flagellum

Alveoli - sacs under the plasma membrane

Alveolate

0.2 µm

Slide 17

Two host life cycle of Plasmodium - causes malaria

0.5 µm

Inside human

Liver

Liver cell

Merozoite

(n)

Red blood

cells

Gametocytes

(n)

Haploid (n)

Diploid (2n)

Key

Merozoite

Apex

Red blood

cell

Zygote

(2n)

FERTILIZATION

Gametes

Inside mosquito

MEIOSIS

Oocyst

Sporozoites

(n)

Slide 18

Ciliates: Paramecium

Ciliates, a large varied group of protists, are named for their use of cilia to move and feed.

They have large macronuclei and small micronuclei - micronuclei function during conjugation, a sexual process that produces genetic variation.