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Exploring Eukaryotic Diversity and Life Cycles in Laboratory Settings

In this lab session, students will engage in an overview of biodiversity, examining pre-lab materials, including prepared slides and live specimens. The instructor will review pre-labs in lab notebooks and collect peer review papers. Students will discuss findings and complete a quiz related to eukaryotic cells and their phylogeny, including groups such as Alveolata, Amoebozoa, and Plantae. Key concepts including alternation of generations and specific life cycles in plants and fungi will be stressed. A thorough understanding of cell types and structures will be emphasized throughout.

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Exploring Eukaryotic Diversity and Life Cycles in Laboratory Settings

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  1. Lab 11. Overview • Instructor checks pre-labs. in lab notebook and collects papers (2 copies). • Diversity and Plant Life Cycle Overview. • Examine prepared slides, models, live organisms, and preserved specimens • Distribution of papers for peer review and discussion of peer reviews. • Instructor overview of diversity. • Complete in-class exercise as quiz over diversity and life cycle.

  2. eukaryotic cells (nucleus, etc.) Eukaryote Phylogeny Chrom- alveolata Amoebozoa Excavata Animalia Rhizaria Plantae Fungi chitin most protozoans, brown algae, & water “molds” glycogen starch, cellulose

  3. The ONLY haploid stage (single celled) Animal Life Cycle

  4. multicellular diploid (2n) stage multicellular haploid (1n) stage Alternation of Generations mitosis zygote mitosis mitosis

  5. multicellular diploid (2n) stage multicellular haploid (1n) stages Alt. of Gen. (Seed Plants) mitosis embryo (in seed) mitosis zygote mitosis in ovule mitosis female male = pollen grain

  6. Plant Phylogeny Coniferophyta Anthophyta Ginkgophyta Chlorophyta Rhodophyta club “mosses” Pterophyta Bryophyta liverworts resin can. flowers, dbl. fert seeds, pollen, heterospory floridean starch xylem, phloem, sporophyte dom. cuticle with air pores, gametangia, embryos, thick spore walls chlorophyll b, starch

  7. multicellular diploid (2n) stage attached & dependent multicellular haploid (1n) stage Moss Life Cycle mitosis zygote mitosis mitosis

  8. multicellular diploid (2n) stage attached & dependent multicellular haploid (1n) stage Fern Life Cycle now independent mitosis mitosis mitosis mitosis zygote

  9. embryo sporo. dependent on ♀ gametophyte In seed now independent mitosis

  10. multicellular haploid (1n) stage multicellular diploid (2n) stage Flowering Plant Life Cycle mitosis mitosis zygote embryo (in seed) embryo sporo. NOT dependent on ♀ gametophyte in seed, dependent on TRIPLOID ENDOSPERM

  11. Many Separate Carpels Few Fused Carpels Flowers

  12. Kingdom Fungi NOT PLANTS! Cell walls with chitin and heterotrophic Energy stored as glycogen Chitin in cell walls Hyphae = fungal filaments one cell thick (singular = hypha) yeast

  13. Don’t leave without 2 papers to peer review. At/Near the end of lab the instructor will conduct a diversity overview and then a diversity quiz.

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