AP Biology Dramatic video fairly dramatic video AP Biology Dramatic videoDramatic video about PROTISTS!! fairly dramatic video fairly dramatic video.

AP Biology

Dramatic video

fairly dramatic video

AP Biology

Dramatic video about PROTISTS!!

fairly dramatic video

AP Biology 2007-2008

DomainBacteria

DomainArchaea

DomainEukarya

Common ancestor

Kingdom: Protists

Domain Eukarya

AP Biology

General characteristics Classification criteria

eukaryotes not animal, plant or fungi

That’s more ofwhat they’re not

& notwhat they are!

AP Biology

Great Diversity

dino

flage

llate

s

& c

iliat

es

eugl

enoi

ds

brow

n al

gae

& d

iato

ms

red

alga

e

gree

n al

gae

mis

cella

neou

s?

AP Biology

Problems with Protist Classification

Euglenozo

a

Animal

s

Strepto

phyta

(incl

udes la

nd pla

nts)

Choanofla

gellid

a

Fungi

Chloro

phyta

Rhodophyta

Stram

enopila

Alveo

lata

Archae

a

Bacte

ria

Something’snot right here!

Too Diverse! doesn’t reflect any evolutionary relationship

amongst all kingdom members Paraphyletic (what is life’s basal taxon?)

AP Biology

Theory of Endosymbiosis

Ancestral eukaryotic cell Eukaryotic cell withmitochondrion

internal membrane system

aerobic bacterium

mitochondrion

chloroplast

Eukaryotic cell with chloroplasts

photosyntheticbacterium

Paramecium & symbiont Chlorella

AP Biology

Protist Diversity The full spectrum of modes of life

from unicellular to multicellular autotrophic to heterotrophic asexual to sexual reproduction pathogenic to beneficial sessile to mobile

AP Biology

Motility How Protists move

flagellum cilia pseudopod

AP Biology

Protist Diversity Animal-like Protists

heterotrophs, predators Amoeba Paramecium Stentor

Paramecium with food vacuoles stained red

Amoeba ingesting a Paramecium

AP Biology

Protist Diversity Plant-like Protists

autotrophs, photosynthesis Euglena algae diatoms

AP Biology

Figure 28.15

Blade

Stipe

Holdfast

AP Biology

Protist Diversity Parasitic & pathogenic Protists

malaria Giardia trypanosomes

Plasmodium

Giardia

Trypanosoma

AP Biology

Protist Diversity Beneficial & necessary Protists

phytoplankton small algae + diatoms much of the world’s photosynthesis produces ~90% of atmospheric oxygen

zooplankton heterotrophic protists + animals key ecological role at base of

marine food web

Mmmmmm!Sounds like breakfast!

AP Biology

10 cm

Mature femalegametophyte

(n)

Developingsporophyte

Zygote(2n)

Haploid (n)Diploid (2n)

Key

Sporangia

Gametophytes(n)

Zoospore

Female

Male

Sperm

MEIOSIS

FERTILIZATION

Sporophyte(2n)

Egg

Figure 28.16-2

AP Biology

Sporozoites(n)

Oocyst

Zygote(2n)

Merozoite(n)

Gametes

Liver

Livercell

Red bloodcells

Gametocytes(n)

Merozoite

Apex

0.5 mRed bloodcell

Key

Haploid (n)Diploid (2n)

Inside mosquito Inside human

MEIOSIS

FERTILIZATION

Figure 28.10-3

AP Biology

Figure 28.17-3

Germ tube

Cyst

HyphaeASEXUAL

REPRODUCTION

Zoospore(2n)

Zoosporangium(2n)

Zygotegermination SEXUAL

REPRODUCTION

Key

Haploid (n)Diploid (2n)

MEIOSIS

FERTILIZATION

Zygotes(oospores)

(2n)

Antheridialhypha with

sperm nuclei(n)

Egg nucleus(n)

Oogonium

AP Biology

Stalk

Zygote(2n)

FERTILIZATION

MEIOSIS

Amoeboid cells(n)

Germinatingspore

Spores(n)

Flagellatedcells(n)

Maturesporangium

Youngsporangium

Feedingplasmodium

Matureplasmodium

(preparing to fruit)

4 cm

1 mm

Key

Haploid (n)Diploid (2n)

The life cycle of a plasmodial slime mold.Cool time-lapse video

What is the benefits of heterokaryosis (becoming plasmodial)?

AP Biology 2007-2008

Any Questions??