Review for Lab Quiz 1
BIO 201: Botany
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
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
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
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
2 - Angiosperm Reproduction
• Reproductive structure = flower
- sepals
- petals
- stamen
- carpel
Anther development
Anther development
Pollen tubes
Ovary
Ovary
Seeds
Seeds
Lab 3 - Fruits
• General fruit names - four categories
1. Number ovaries/flowers
(single, aggregate, multiple)
2. Parts other than ovary (simple, accessory)
3. Fleshiness (fleshy, dry)
4. Dehiscence
(dehiscent, indehiscent)
Fruits
• Each fruit then grouped by it’s four words.
Fruits
Fruits
• Also categorize by specific fruit name (usually
1-2 words)
Examples:
capsule, nut, berry, false berry, legume
Fruit components
• Pericarp, seed, endosperm, embryo
Lab 4 - Algae
• Morphological forms:
unicellular, filamentous, colonial, thallose
Ectocarpus
• Division
• Growth form
Spirogyra - vegetative
•
•
•
•
Filamentous
Chloroplast
Cell wall
Pyrenoid
Spirogyra – conjugation
• Gamete type
• Life cycle
• Dark green
circles
• Connection
between cells
Fucus
• Division
• Growth form
• Oval structures
Fucus reproduction
• Spherical
tips?
Fucus reproduction
• Male vs female?