Life cycles laboratory l.jpg
This presentation is the property of its rightful owner.
Sponsored Links
1 / 11

Life Cycles Laboratory PowerPoint PPT Presentation


  • 106 Views
  • Uploaded on
  • Presentation posted in: General

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.

Download Presentation

Life Cycles Laboratory

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Life cycles laboratory l.jpg

Life Cycles Laboratory

Observations of Life Cycle Stages in Protists and Plants


Haplontic life cycle of chlamydomonas l.jpg

Haplontic Life Cycle of Chlamydomonas

Resting spore withstands poor conditions

  • Photosynthetic protist showing an early eukaryotic life cycle

  • No mitosis in diploid phase

To observe: Place a drop from the cell culture between a slide and cover slip.


Haplontic life cycle of ulothrix l.jpg

Isogametes fuse to form diploid zygote

Gametangium: cell that produces gametes by mitosis

Haplontic Life Cycle of Ulothrix

  • Photosynthetic Protist

  • No mitosis in diploid phase

  • Zygote produces spores by meiosis

  • Haploid gametophyte grows from spore by mitosis

  • Gametophyte can produce gametes or zoospores

  • Motile spores (zoospores) formed by mitosis or meiosis

Sporangium: cell that produces spores by mitosis

Spore: haploid cell that can grow by mitosis

Gametophyte: multicellular haploid structure that produces gametes


Haplontic life cycle of ulothrix4 l.jpg

Haplontic Life Cycle of Ulothrix

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.


Diplohaplontic life cycle of ulva l.jpg

Diplohaplontic Life Cycle of Ulva

  • Photosynthetic Protist

  • Introduction of Mitosis in Diploid phase

  • Gametophyte produces isogametes

  • Isomorphic gametophyte and sporophyte

Sporophyte: multicellular diploid structure that produces spores by meiosis


Diplohaplontic life cycle of ulva6 l.jpg

Diplohaplontic Life Cycle of Ulva

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.


Diplontic life cycle of fern l.jpg

Archegonium: organ that produces eggs by mitosis

Diplontic Life Cycle of Fern

  • Plant

  • Smaller gametophyte

  • Larger, longer-lived sporophyte with tissues and organs

  • Spores producedby meiosis in sporangia on the underside of sporophyte leaves

Antheridium: organ that produces sperm by mitosis

contain sporangia(singular: sorus)


Prepared slide mature antheridia l.jpg

Prepared Slide: Mature Antheridia

Sperm within Antheridia

Gametophyte with Antheridia


Prepared slide mature archegonia l.jpg

Prepared Slide: Mature Archegonia

Each archegoniumcontains one egg

Gametophyte with Archegonia


Prepared slide young sporling l.jpg

Sporling

Gametophyte

Prepared Slide: Young Sporling


Observation sorus sprorangia and spores l.jpg

Spores

Indusium

Sporangium

Observation: 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.


  • Login