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 other With 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. Leaves alternate on stems
2. Leaves opposite on stems
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 * 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

9. Anther development

10. Anther development

11. Pollen tubes

12. Ovary

13. Ovary

14. Seeds

15. Seeds

16. 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)

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

18. Fruits

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

20. Fruit components
Pericarp, seed, endosperm, embryo

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

22. Ectocarpus
Division
Growth form

23. Spirogyra - vegetative
Filamentous
Chloroplast
Cell wall
Pyrenoid

24. Spirogyra – conjugation
Gamete type
Life cycle
Dark green circles
Connection between cells

25. Fucus
Division
Growth form
Oval structures

26. Fucus reproduction
Spherical tips?

27. Fucus reproduction
Male vs female?