Jan 20, 2016
The Animal Cell
The Chloroplast
Chromoplast in Forsythia
Cell Walls
Water transport thru cells
Cellular Development: Mitosis
Early Cellular Development: The seed
The Generic Seedling
Tropical Rain Forest
• Moist, high temps• Consistent year round
growth• High diversity• Some adaptations:
– Most plants evergreen– Drip tips– Epiphytes– Waxy leaves
Southeastern mixed forest
• Nutrient poor and seasonally flooded soils
• Still warm temps, but lower humidity
• Both deciduous and evergreen
• Fire adapted
Temperate Deciduous Forest
• Too cold/dry in winter to support much photosynthesis
• Snow melt allows for rapid growth in spring
• Very similar to species found in Asia
Taiga
• Limited by temperature
• Acidic soils• Mostly evergreen
trees
Grasslands
• Temperature extremes, too dry and too much fire to support forest
• Few trees, mostly grasses and forbs
• C3 and C4 grasses: dominance determined by temp and water
• Very little original prairie left
Hot Desert
• Hot, dry• Mostly cacti, shrubs,
grasses• Slow growing
vegetation• Adaptations:
– Water stress– CAM photosynthesis– Protection against
herbivory
West Coast biomes
Communities: Groups of interacting organisms in a given place
Which organisms do plants interact with?
• Positive interactions:– Pollinators– Seed dispersers– Nitrogen fixing
bacteria and fungi– Animals that prey
upon herbivores
• Negative Interactions– Herbivores– Fungi – Pathogens
Lab: How are plants adapted to their particular environments?
• What adaptive trait do you see?
• How is this an adaptation to this plant’s environment?