Lab 3- Algae, Cyanobacteria, and Protozoa Basics

Unicellular or multicellular eukaryotic

Algae (unicellular/multicellular/prokaryotic/eukaryotic)

Cellulose

Algae cell wall material

Photoautotrophs

Algae feeding

Flagella

How do algae move?

sexual and asexual

Algae reproduction

• Base of the food chain (phytoplankton)

• Produces 50% of atmospheric O2

• Cyanobacteria aid in nitrogen fixation cycle

Positive impacts of algae and cyanobacteria

• High densities, some can produce dangerous toxins (ex. dinoflagellate red tides)

• Can remove oxygen from water when rapidly growing, killing off other organisms

Negative impacts of algae and cyanobacteria

• Food

• Abrasives

• Cosmetics

• Solidifiers

• Nutritional supplements

• Fertilizer

• Biofuel production

Industrial/Commercial Roles of algae and cyanobacteria

Cyanobacteria

The only photoautotrophic prokaryote capable of producing oxygen

Cyanobacteria

Anabaena is a type of what?

Unicellular eukaryotes

Protozoa (unicellular/multicellular/prokaryotic/eukaryotic)

Protozoa

Motile, animal-like, using pseudopods, flagella, or cilia to move

Protozoa

Heterotrophic Saphrocytes (absorbing or ingesting nutrients)

Protozoa

Trophozoite (Feeding/growing stage, active infection in pathogenic)

Feeding/growing stage, active infection in pathogenic

Trophozoite

Cyst

Dormant resistant form, pathogen transmission

Protozoa

Cysts are the dormant form for which microbe

Sexual and asexual

Protozoa (reproduction)

Schizogony

A multiple fission process where the nuclei replicate several times before cell division

Fission, budding, schizogony

Three ways that protozoa reproduce asexually