BIO_114 LAB 2

Aseptic Technique

Procedures that minimize the chance of unwanted microbes being accidentally introduced into the lab.

Heat Fix

A process that kills organisms, adheres them to the slide, and prepares them to accept dye during staining.

Gram Stain

A method for differentiating bacterial species based on the characteristics of their cell walls.

Decolorization

The step in Gram staining where alcohol dissolves the lipid layer of gram-negative cells, allowing the primary stain to wash away.

Excavates

A group of protists that contain an excavated feeding groove along their cell bodies, including Diplomonads, Parabasilids, and Euglenozoans.

Alveolates

A group of protists characterized by the presence of alveoli, which are air sacs underneath the cell membrane.

Archaeplastids

Photosynthetic protists considered the ancestors of modern land plants, including red and green algae.

Alternation of Generations

A life cycle that alternates between a multicellular haploid organism and a multicellular diploid organism.

Sporophyte

The multicellular diploid organism that undergoes meiosis to produce haploid spores.

Gametophyte

The multicellular haploid organism that produces haploid gametes through mitosis.

Unikonts

A clade of protists that are primarily heterotrophic and believed to include the ancestors of fungi and animals.

Stramenopiles

A subgroup of protists that includes photosynthetic organisms and aquatic decomposers like diatoms and brown algae.