Evolution in volvocine algae
This presentation is the property of its rightful owner.
Sponsored Links
1 / 42

Evolution in Volvocine Algae PowerPoint PPT Presentation


  • 261 Views
  • Uploaded on
  • Presentation posted in: General

Evolution in Volvocine Algae. Colonial. Unicellular. Common ancestor – not direct line. Unicellular -. Single cell. Colonial -. Different configurations. Isogamous -. Identical gametes. Eyespot -. Detect UV light. Flagella -. Propel the cell. Polar -. Anterior/posterior.

Download Presentation

Evolution in Volvocine Algae

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Evolution in volvocine algae

Evolution in Volvocine Algae

Colonial

Unicellular

Common ancestor – not direct line

Unicellular -

Single cell

Colonial -

Different configurations

Isogamous -

Identical gametes

Eyespot -

Detect UV light

Flagella -

Propel the cell

Polar -

Anterior/posterior

Vegetative cells -

Cannot reproduce

Reproductive cells -

New colonies

Oogamous -

Egg & sperm


Volvocine line beginning

Volvocine Line Beginning

http://www2.mcdaniel.edu/Biology/botf99/algaeheadpages/lowealgaef/greens/studealgae/stvov/stvolvox.htm

Chlamydomonas

Most primitive

Single celled

Bi-flagellate for movement

Isogamous


Pandorina

Pandorina

Large eyespots on one end

http://www.botany.hawaii.edu/faculty/webb/bot311/Chlorophyta/PandorinaLg.jpg

New colony

Polar

Isogamous

Each cell


Eudorina

Eudorina

Smaller

Colonial

Polar

Vegetative & reproductive

First move toward reproductive specialization

Isogamous


Volvox colonial polar

Volvox – colonial & polar

Daughter colonies

1000’s vegetative

Few reproductive

Large nonmotile eggs

Small sperm

Oogamous

Communication


Evolution in volvocine algae

Chlamydomonas

Gonium

Eudorina

Volvox

http://nimravid.wordpress.com/2008/04/16/evolve-multicellularity-volvox/


Symbiosis

Symbiosis

2 different species live together

Relationship

Host - largest

Mutualism -

Both organisms benefit

Commensalism -

1 benefits, 2nd unaffected

Parasitism -

1 benefits, 2nd harmed

Co-evolve to stable relationship


Mutualism lichens

Mutualism - Lichens

Algae

Fungal hyphae

Fungus & alga


Body shape crustose

Body shape = Crustose

http://www.cs-music.com/features/photos/lichen-fence.html


Evolution in volvocine algae

http://waynesword.palomar.edu/pljan98e.htm


Body shape foliose

Body shape = Foliose

http://waynesword.palomar.edu/pljan98f.htm


Evolution in volvocine algae

http://waynesword.palomar.edu/pljan98f.htm


Body shape fruticose

Body shape = Fruticose

http://www.hiltonpond.org/ThisWeek010222.html


Mutualism termite protozoa

Mutualism – termite & protozoa

http://www.securitypest.com/images/TermiteAcrop.jpg


Trichonympha

Trichonympha

  • http://www.uccs.edu/~rmelamed/MicroFall2002/Chapter%2011/Animal-like.html


Evolution in volvocine algae

  • http://www.sfu.ca/~fankbone/biol/index2.html


Commensalism barnacles

Commensalism - Barnacles

Home & transportation

  • http://www.learner.org/jnorth/images/graphics/u-z/gwhale_tail.jpg


Evolution in volvocine algae

Remora

http://magma.nationalgeographic.com/ngexplorer/0505/articles/gallery_1.html


Evolution in volvocine algae

  • http://www.ms-starship.com/sciencenew/symbiosis.htm


Commensalism bromiliad

Commensalism - Bromiliad

Epiphyte


Orchids

Orchids


Parasitism host is harmed

Parasitism – host is harmed

Modified

Parasite -

Needs nourishment

Needs transportation

Needs to reproduce

Complicated life cycle


Anopheles mosquito

Anopheles Mosquito

Secondary host

Malaria protozoa

Sexual reproduction

Transportation


Plasmodium a protozoa

Plasmodium a protozoa

Penetrates human liver cells – asexual spores


Infected red blood cells

Infected Red Blood Cells

Asexual spores reproduce until RBC ruptures

Male & female gametocytes

Mosquito = fuse to form zygote


Tapeworm eggs

Tapeworm eggs

Ingested by primary host

Larva


Bladder worm

Bladder-Worm


Evolution in volvocine algae

Encysted bladder worm in meat


Primary host

Primary host

Small intestine

7 meters long


Scolex

Scolex

Suckers

hooks


Large muscular full of fertilized eggs

Large & Muscular – full of fertilized eggs


Blood fluke eggs

Blood Fluke Eggs

From feces


Eggs hatch into ciliated larvae

Eggs hatch into ciliated larvae

Infect secondary host - snail


Mother sporocyst produces many daughters

Mother sporocyst produces many daughters


Immature larvae in sporocyst

Immature larvae in sporocyst


Larvae escape snail into water

Larvae escape snail into water

Invade humans through skin


Adult blood flukes

Adult Blood Flukes

In blood vessels

Sexual reproduction

Eggs migrate


200 000 000 people infected

200,000,000 People Infected

1,000,000 death annually


Liver fluke

Liver Fluke


Liver fluke distribution

Liver Fluke Distribution


  • Login