Protists

Characteristics of all ProtistsEukaryotkes: no distinct nucleus.Reproduce: asexually via mitosis unless

stressed.Range: unicellular to

multicellular without specialized tissues.

Protist groups

Protazoa•Animal like•They do not produce their own food. •They are predators

Algae•Plant like •Produce their own food through photosynthesis.

Protists live in almost any environment that contains water.

Ameoba

A very primitive form of single-celled animal that has an undefined shape and moves by changing its shape.• Controlled by single nucleus• Eats by surrounding food and ingesting into inclusion

vacuole• Reproduces by splitting in two• Amoeba feeds

Protazoa Diversity (animal – like)

 from the Greek meaning ‘first animal’, refers to simple, single celled eukaryotic organisms. They cannot make their own food.

Slime Mold

• Brightly colored• Harmless organism• Likes warm temperatures• Likes high humidity• Fades to brown when it dries up.• Beneficial organism• Feeds on harmful fungi found in bark mulch

Protazoa Diversity (animal – like)

Paramecium

video

• Swims by beating cilia• 0.25mm in length• Feeds mostly on bacteria• Uses cilia to move food into gullet

Protazoa Diversity (animal – like)

Algae DiversityGreen Algae

•Algae blooms due to farmers using too much fertilizer and cities failing to treat their sewage.'•Algae bloom is not harmful.•Algae absorbs carbon dioxide cleans the water •Algae is perfectly safe to eat.

•Ancestors to modern land plants•Chinese officials blame a new exotic type of algae.•High levels of nutrients cause algae to bloom.

Diatoms

Single celled photosynthesis algae with hard silica for cell walls

Algae Diversity

Algae DiversityBrown Algae

Review1. What does Eukaryotkes mean?2. Why are Algae like plants?3. Protazoa are animal-like. How?4. How do Ameoba move?5. How does an Ameoba reproduce?6. What does Slime Mold feed on?7. How does a Paramecium swim?8. What causes Algae to bloom?9. Algae absorbs ______10. Is Algae safe to eat?11. What makes Algae a Diatom?12. What characteristic makes Brown Algae a protist?