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Protists are unicellular organisms that have a nucleus.
Unicellular One of the first groups of living things on
Earth. (1.5 billion years ago.) Microscopic Can cause disease. Can be parasites
Has a nucleus. Live in watery environment. Generally live as individual cells. Protists vary greatly in appearance and
function.
I. Animal-like Protists II. Plant-like Protists. III. Fungus-like Protists.
Protozoan means “First Animal”. Cells contain a nucleus. Cells lack a cell wall. They are heterotrophs. Most can move on their own.
1. Sarcodines (SAHR-koh-dighnz) 2. Ciliates (SIHL-ee-ihts) 3. Flagellates (FLAJ- ehl-ihts) 4. Sporozoans (spohr-oh-ZOH-uhnz)
Commonly called amoeba Have pseudopods (Greek:“false
feet”) Pseudopods are used for movement
and to capture food.
Contractile Vacuoles: controls amount of water inside
Food Vacuole: where food is digested.
They feed on bacteria and other protoctists.
Phagocytosis
Am0ebas reproduce by dividing into two new cells (binary fission).
They are sensitive to light and some chemicals.
ENTAMOEBA HISTOLYTICA
is an example of a pathogenic amoeba that can produce ulcers on intestinal walls and cause amoebic dysentery in humans
Are protozoans that move about by means of numerous hairlike cilia..
Free swimming ciliates
Reproduce by bf and conjugation
Have a Flagellum: a long whip-like structure used for movement.
Many live in animals
Based on the term spore, the infectious form in which the organism is transmitted from one host to another.
Pass from one host to another. Pass from ticks, mosquitoes or other
animals to humans.
Unicellular and Multicellular Colonies (groups of unicellular protists) Can move on their own Autotrophs: make their own food
from simple materials using light energy (photosynthesis).
Pigments: chemicals that produce color
Euglenoids (yoo-GLEE-noydz) Diatoms (DIGH-ah-tahmz) Dinoflagellates (digh-noh-FLAJ-eh-layts) Red Algae Green Algae Brown Algae
Green Unicellular Live in fresh
water Autotrophs, but
can be heterotrophs under certain conditions.
Flagella Eyespot:
sensitive to light.
Unicellular 10,000 living
species. Aquatic Glass like cell
wall
Unicellular Cell walls are like
plates of armor. Two flagella Spins when it
moves. Colorful
(pigments) Can glow in the
dark. Causes Red Tide
Multicellular seaweeds
Live in deep ocean waters
Used for ice cream and hair conditioner
Used as food in Asia
Most are unicellular Some form colonies Few are
multicellular Can live in fresh
and salt water and on land in damp places.
Very closely related to green plants.
Commonly called seaweed
Can contain brown, green, yellow, orange and black pigments.
Attach to rocks Have air bladders Used as food
thickeners
Heterotrophs Have cell walls. Many have flagella and are
able to move at some point in their lives.
Live in water or moist places.
Tiny threads that look like fuzz.
Attack food crops Caused the Irish
Potato Famine.
Reproduce by Fruiting Bodies:
The Fruiting Bodies contain Spores.
At first they look like ameba, then later they look like mold.
Live on moist shady places.
Feed on bacteria and other microorganisms.