review for lab quiz 1 bio 201: botany. lab 1 - taxonomic keys typically use the dichotomous format...
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Review for Lab Quiz 1
BIO 201: Botany
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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
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Example Taxonomic Key to Shrubs
1. Leaves scale like, very small (1-2 mm wide) . . . . . . . . Juniper1. Leaves large (10 mm or more wide) and flat . . . . . . . . . . . . . 2
2. Leaves alternate on stems . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32. Leaves opposite on stems . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3. Leaf margins with thorns . . . . . . . . . . . . . . . . . . . . . . . . . Holly3. Leaf margins smooth . . . . . . . . . . . . . . . . . . . . . . Crape Myrtle
4. Leaf surface waxy, smooth . . . . . . . . . . . . . . . . . . . . . Aucuba4. Leaf surface hairy . . . . . . . . . . . . . . . . . . . . . . . . Beauty Berry
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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
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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
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2 - Angiosperm Reproduction
• Reproductive structure = flower- sepals- petals- stamen- carpel
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Seeds
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Seeds
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Lab 3 - Fruits
• General fruit names - four categories1. Number ovaries/flowers
(single, aggregate, multiple)2. Parts other than ovary (simple, accessory)3. Fleshiness (fleshy, dry)4. Dehiscence
(dehiscent, indehiscent)
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Fruits
• Each fruit then grouped by it’s four words.
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Fruits
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Fruits
• Also categorize by specific fruit name (usually 1-2 words)Examples:capsule, nut, berry, false berry, legume
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Fruit components
• Pericarp, seed, endosperm, embryo
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Lab 4 - Algae
• Morphological forms:unicellular, filamentous, colonial, thallose
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Spirogyra - vegetative
• Filamentous• Chloroplast• Cell wall• Pyrenoid
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Spirogyra – conjugation
• Gamete type• Life cycle• Dark green
circles• Connection
between cells
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Fucus
• Division• Growth form• Oval structures
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Fucus reproduction
• Sphericaltips?
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Fucus reproduction
• Male vs female?