LIFESCI 1 Lecture 3: 4-27
4/27/15
Flowers & Pollination
• Flowers evolved to attract pollinators; different rewards attract different kind of
pollinators
• Why specialize on certain flowers? What’s in it for the flower? What’s in it for the moth?
- Flower would get the right kind of pollen
- The moth will experience less competition
• Orchid Bees → have communal display grounds where they share their scents to females.
Usually simple scents.
Fungi
• More closely related to animals than plants
• Both fungi and animals synthesize chitin and have single flagella in flagellate cells
• They are autotrophs → make biomass from inorganic material
• When cyanobacteria began making oxygen it produced a toxin and also oxides iron
• We can tell when cyanobacteria became photosynthetic because it would oxidize the
rocks in its surroundings → can also determine day and night because of this
• Very few kinds of organisms can digest cellulose and lignin → but many fungi can and
do
• Not much else can help with the digestion of plant matter → extremely important in
recycling carbon
• Two Morphologies of fungi
- Yeast → single celled fungi important for fermentation
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