Life Cycles Laboratory. Observations of Life Cycle Stages in Protists and Plants. Haplontic Life Cycle of Chlamydomonas. Resting spore withstands poor conditions. Photosynthetic protist showing an early eukaryotic life cycle No mitosis in diploid phase.
Observations of Life Cycle Stages in Protists and Plants
Resting spore withstands poor conditions
To observe: Place a drop from the cell culture between a slide and cover slip.
Gametangium: cell that produces gametes by mitosisHaplontic Life Cycle of Ulothrix
Sporangium: cell that produces spores by mitosis
Spore: haploid cell that can grow by mitosis
Gametophyte: multicellular haploid structure that produces gametes
To observe: Place a drop from the cell culture between a slide and cover slip.Include some green fibers in your sample.
You do not need to distinguish between gametangia and sporangia.
Sporophyte: multicellular diploid structure that produces spores by meiosis
To observe: Use a scalpel and/or forceps to take a small sample of the leafy structure and place it between a slide and cover slip.
You do not need to distinguish between sporophytes and gametophytes.
Antheridium: organ that produces sperm by mitosis
contain sporangia(singular: sorus)
Sperm within Antheridia
Gametophyte with Antheridia
Each archegoniumcontains one egg
Gametophyte with Archegonia
GametophytePrepared Slide: Young Sporling
SporangiumObservation: Sorus, Sprorangia and Spores
To observe: Scrape some material from the underside of a fern leaf onto a slide. Distribute it into a thin layer. Add a cover slip. Adding water is optional.