the path of life where do we go from here? from microbes to humans
TRANSCRIPT
The Path of Life
Where do we go from here?
From Microbes to HumansQuickTime™ and a
TIFF (Uncompressed) decompressorare needed to see this picture.
Follow The Tree of Life
QuickTime™ and aTIFF (Uncompressed) decompressor
are needed to see this picture.
By the end of this lesson, you will be able to: Describe the make-up of the Protista
Kingdom Explain the important evolutionary
trends that occur in animal evolution Define the animal characteristics Describe the major groups of animals
and provide their general characteristics
Where do the protists belong?
Chapter 20 Unsettled group/No
agreement on classification
Any organism that is not a plant, animal or prokaryote
Eukaryote Mostly single-celled
QuickTime™ and aTIFF (Uncompressed) decompressor
are needed to see this picture.
QuickTime™ and aTIFF (Uncompressed) decompressor
are needed to see this picture.
Zooflagellates
Animal-like Swim with flagella Mostly live solitary
QuickTime™ and aTIFF (Uncompressed) decompressor
are needed to see this picture.
Sarcodines
Animal-like Move with
extensions of cytoplasm called pseudopods
Ex: ameobas
QuickTime™ and aTIFF (Uncompressed) decompressor
are needed to see this picture.
Ciliates
Use cilia to move and feed
QuickTime™ and aTIFF (Uncompressed) decompressor
are needed to see this picture.
Sporozoans
Do not move on their own
Parasites Ex: Cause malaria
QuickTime™ and aTIFF (Uncompressed) decompressor
are needed to see this picture.
Plant-like Protists
Unicellular algae Different pigment
types Variety of cell wall
structures Cause red tides and
algal blooms
QuickTime™ and aTIFF (Uncompressed) decompressor
are needed to see this picture.
Multicellular algae
Plant-like structures Ex: Fucus & Kelp
QuickTime™ and aTIFF (Uncompressed) decompressor
are needed to see this picture.
Fungus-like protists
Heterotrophs tht absorb nutrients
Ex: Sime molds
QuickTime™ and aTIFF (Uncompressed) decompressor
are needed to see this picture.
What is an animal?
Multicellular Eukaryotes Heterotrophs Lack cell walls Invertebrates (most)
or vertebrate
QuickTime™ and aTIFF (Uncompressed) decompressor
are needed to see this picture.
QuickTime™ and aTIFF (Uncompressed) decompressor
are needed to see this picture.
Major Animal Evolution Trends:
Cell specialization Organization Development of a
coelom Body Symmetry Cephalization
QuickTime™ and aTIFF (Uncompressed) decompressor
are needed to see this picture.
What is a coelom?
QuickTime™ and aTIFF (Uncompressed) decompressor
are needed to see this picture.
What does symmetry mean?
QuickTime™ and aTIFF (Uncompressed) decompressor
are needed to see this picture.
What does cephalization mean?
QuickTime™ and aTIFF (Uncompressed) decompressor
are needed to see this picture.
Where do you belong?
Tissues/Organization? Coelom/Body cavity? Symmetry? Cephalization? Invertebrate or
vertebrate?
QuickTime™ and aTIFF (Uncompressed) decompressor
are needed to see this picture.