This document discusses the characteristics of different types of protists. It describes how animal-like protists are heterotrophs and mostly unicellular, while plant-like protists, or algae, are autotrophs that use photosynthesis. It also explains that fungus-like protists have cell walls and reproduce using spores, making them similar to both animals and plants. The document provides examples of different protist groups, such as protozoans, algae, slime molds and water molds. It also discusses how the protist Plasmodium causes the disease malaria in humans.

1. Protists
II Bimestrial
Sixth Grade
Ms. Matta
Science Class
Chapter 2
Lesson 3

2. Unlock the Big ?
What are the characteristics of
animal/plant/fungus - like
protists?

3. My Planet Diary
Dancing For a Cause
The protist Plasmodium
causes malaria, a disease of
the blood that can kill
people. Plasmodium is
carried by mosquitoes and
is spread y their bites.
When Allyson Brown from
Melbourne, Florida, learned
about malaria, she took
action.
• She turned a school dance
into a fundraiser, named
Staying Alive, to buy
mosquito nets for people
in Africa. The nets keep
mosquitoes away while
people sleep. Since then,
Allyson has teamed with
the organization, Malaria
No More, to help other
schools to do the same.

4. My Planet Diary
• Malaria claims the life of a child in Africa
every 30 seconds. Nets like these may
help to prevent malaria infections.

5. Vocabulary Lesson 3
• protist
• protozoan
• pseudopod
• contractile
vacuole
• cilia
• algae
• pigment
• spore

6. Protists Categories
• Protists: are eukaryotes, that cannot be classified
as animals, plants or fungi.(Protists are diverse)
https://www.youtube.com/watch?v=0-6dzU4gOJo
• Categories:
1. Animal-like protists
2. Plant-like protists
3. Fungus-like protists

7. Characteristics Animal-like
Protists
Like animals, animal-like protists are:
• heterotroph
• most can move to get food
But unlike animals, animal-like protists, or
protozoans are unicellular.

8. The Four Groups of
Protozoans
1. Protozoans with pseudopods
• The Amoeba belongs to this group called
sarcodines.
• Sarcodines move and feed by forming pseudopods.
• The word pseudopods means “false foot”.
• Amoebas have a contractile vacuole, a estructure
that collects and expels excess water from the cell.

9. Parts of the Amoeba

10. The Four Groups of
Protozoans
2. Protozoans with flagella
• Are protozoans that use long, whiplike flagella to
move.
• Some live inside the bodies of there organisms.
• One type of flagellate lives in the intestines of termites.
• When people drink water containing a flagellate, they
attach to their intestines, reproduce and develop a
intestinal disease.

11. Parts of the Flagellates

12. The Four Groups of
Protozoans
3. Protozoans with Cilia
• The Ciliates have structures called cilia.
• These hairlike projections beat with a wavelike motion,
moving the organism.
• Has two contractile vacuoles that collect and expel water
from the cell.
• It has two nuclei, the large nucleus controls the everyday
tasks of the cell and the small nucleus functions in
reproduction.

13. Parts of the Ciliates

14. The Four Groups of
Protozoans
4. Protozoans that are Parasites
• This protozoans are characterized more by the way they
live than by the way they move.
• They are all parasites that feed on the cells and body
fluids of their hosts.
• Some have flagella, and some depend on hosts for
transport.
• The disease spreads when a mosquito bites a person,
becomes infected and then bites a healthy person.

15. Example of Parasites
• Plasmodium, is a protozoan that causes malaria.

17. Characteristics Plants-like
Protists
They are commonly called algae, are extremely
diverse.
• Autotrophs
• Unicellular or multicellular
• Use pigments to capture the sun’s energy.
(Pigments: chemicals that produce color. Algae can
be yellow, green, red, brown, orange or even black)

18. TYPES OF ALGAE
FUNCTION Euglenoids Dinoflagellates Diatoms Red
Algae
Brown
Algae
Produce oxygen
Food source for
other aquatic
organisms
Eaten by
people
Used in
insecticides
Used in polishing
products
Used in hair
conditioner

19. Identify the type of Algae

20. Characteristics Fungus-
like Protists
Fungus-like protists are sort of like animals because
they are heterotrophs.
Fungus like protists are sort of like plans because
their cells have walls.
• Fungus like protists are heterotrophs, have cell
walls, and use spores to reproduce.
(Spore: Is a tiny cell that is able to grow into a new
organism)

21. Three Types of fungus-like
protists
• Slime Molds
• Water Molds
• Downy Mildews

22. Videos
• https://www.youtube.com/watch?v=SCfg3sywC7k
• https://www.youtube.com/watch?v=Ln69k7LyTsU