The kingdom of

Protists

Protozoa and Algae

They look diferent, but they belong to the same kingdom

Protozoa

– Unicellular– Heterotrophic

Algae

– Unicellular or pluricellular– Autotrophic

Protozoa live...

In fresh or sea water In moist soil

Inside other organisms

Protozoa are heterotrophic. They can eat... Rotting material

(saprophytes)

Bacteria, or other protozoa (predators)

Some feed on other organisms (parasites)

Protozoa move in a variety of ways. Watch it in Youtube

Cillia – Paramecium

Pseudopodia – Amoeba Immobiles – Plasmodium

Flagella – Trypanosoma

Watch out! Protozoa can be confused with bacteria, but...

Bacteria – Prokaryote Protozoa – Eukaryote

Protozoa are about ten times bigger than bacteria, and they are more complex

Protozoa and human beingsSome protozoa produce diseases in humans.

Many times they are transmitted by insects

Malaria

(Transmitted by the

Anopheles mosquito)

Chagas disease (vinchuca)

Sleeping sickness

(Tsetse fly)

Algae can be… Unicellular Pluricellular

Colonial

Algae are always photosynthetic

Algae can live in…

Seawater (seaweed) Freshwater

We can classify algae in… Green algae Red algae

Brown algae

Algae can be confused with plants…

Ulva lactuca Lettuce

…but algae don’t have real tissues PLANTS

Leaves

Stipe Roots

ALGAE

Philloids

Cauloid

Rhizoid

…if we watch carefully, all the cells of algae are the same…

Algae use to be beneficial to us

Cosmetics Food

Laboratory material