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Review for Lab Quiz 1: BIO 201 Botany Lab - Taxonomic Keys Format

Learn about the dichotomous format of taxonomic keys, how to use them effectively, and key concepts on angiosperm reproduction, fruits, and algae in this review for Lab Quiz 1. Understand how to categorize plants based on specific characteristics and features.

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Review for Lab Quiz 1: BIO 201 Botany Lab - Taxonomic Keys Format

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  1. Review for Lab Quiz 1 BIO 201: Botany

  2. Lab 1 - Taxonomic Keys Typically use the dichotomous format • Two parallel statements • Make a choice of one over the otherWith six petals …..With eight petals ….. • Leads to another set of paired statements

  3. Example Taxonomic Key to Shrubs 1. Leaves scale like, very small (1-2 mm wide) . . . . . . . . Juniper 1. Leaves large (10 mm or more wide) and flat . . . . . . . . . . . . . 2 2. Leaves alternate on stems . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2. Leaves opposite on stems . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3. Leaf margins with thorns . . . . . . . . . . . . . . . . . . . . . . . . . Holly 3. Leaf margins smooth . . . . . . . . . . . . . . . . . . . . . . Crape Myrtle 4. Leaf surface waxy, smooth . . . . . . . . . . . . . . . . . . . . . Aucuba 4. Leaf surface hairy . . . . . . . . . . . . . . . . . . . . . . . . Beauty Berry

  4. 1 - Taxonomic Keys • Need to know your audience* use terms they will know • Don’t use relative terms* large, small • Use absolute terms* 10-15 cm long

  5. Getting started • Look at what you have and notice differences* write down 3-5 features that vary • Group similar things together • Think of ways to split object into two groups(groups do not need to be of equal size) • Split remaining objects into two groups again • Start key with a diagrammatic flow chart

  6. 2 - Angiosperm Reproduction • Reproductive structure = flower- sepals- petals- stamen- carpel

  7. Anther development

  8. Anther development

  9. Pollen tubes

  10. Ovary

  11. Ovary

  12. Seeds

  13. Seeds

  14. Lab 3 - Fruits • General fruit names - four categories • Number ovaries/flowers (single, aggregate, multiple) • Parts other than ovary (simple, accessory) • Fleshiness (fleshy, dry) • Dehiscence (dehiscent, indehiscent)

  15. Fruits • Each fruit then grouped by it’s four words.

  16. Fruits

  17. Fruits • Also categorize by specific fruit name (usually 1-2 words)Examples:capsule, nut, berry, false berry, legume

  18. Fruit components • Pericarp, seed, endosperm, embryo

  19. Lab 4 - Algae • Morphological forms:unicellular, filamentous, colonial, thallose

  20. Ectocarpus • Division • Growth form

  21. Spirogyra - vegetative • Filamentous • Chloroplast • Cell wall • Pyrenoid

  22. Spirogyra – conjugation • Gamete type • Life cycle • Dark greencircles • Connectionbetween cells

  23. Fucus • Division • Growth form • Oval structures

  24. Fucus reproduction • Sphericaltips?

  25. Fucus reproduction • Male vs female?

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