THIRTEEN

Emergent Animals I

adapted from Biology, 10th Edition, 2015, pp. 533, 625

PROKARYOTES

PROTISTS

EUKARYOTES

CHOANOFLAGELLATE ANCESTOR

BACTERIA

ARCHAEA

FUNGI

CHOANOFLAGGELATES

THE FIRST ANIMAL!

-no distinct nuclei

-no other membranous organelles

-asexual reproduction by binary fission

-have membrane-enclosed organelles

     (nucleus, mitochondria, plastids)

-multiple chromosomes of DNA and proteins

-sexual reproduction

-mitosis and meiosis

-ancestor to 2 clades: unikonts and bikonts

-a paraphyletic group (definition, below)

-Kingdom 'Protista' no longer a clade

-the first eukaryotes to evolve

-unicellular, multicellular, and simple, multicellular        organisms

-includes algae, water molds, and protozoa

  • THE COMMON ANCESTOR OF ALL ANIMALS

  • CELLS BECOME SPECIALIZED TO PERFORM SPECIFIC FUNCTIONS

unikont

bikont

(clade)

(clade)

(2 flagella)

  • a single, posterior flagellum

opisthokont

amoebozoa