o’keefe monet matisse manet van gogh
TRANSCRIPT
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O’Keefe
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O’Keefe
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Monet
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Matisse
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Manet
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van Gogh
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Picasso
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Escher
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Salvador Dali
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Abstract Art Extra Credit (+5 max)
Create an abstract representation of an angiosperm(s) utilizing similar techniques you have seen by some of the greats.
Due 3/14-15
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Chapter 38 Quick Overview
Flower Anatomy
Sepals, Petals, Stamens (M), Carpels (F) Male Female (Stamens) (Carpels) Filament Stigma Anther Style Pollen (sperm) Ovary, ovule Receptacle
Embryo sacs
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Pollination:
(pollinating agents) Self pollination
vs. self incompatible (“self”/ “nonself”)
S-genes (fig. 38.6 + fig. 38.5)
Sporophytic and gametophytic self-incompatibility
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“Self-Incompatibility”
prevents Self-Fertilization in some plants
Self/Non-self recognition How is this different from humans?
If “SELF” is detected:
RNA hydrolyzing enzymes may destroy pollen
Or Stigma maybe affected
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Germination
Plants in Motion - Corn germination
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Fruit Types
What is the definition of a “true fruit” ?
Simple, aggregatemultiple (p.738)
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Asexual Reproduction
clone of parent vegetative reproduction, fragmentation,
apomixis (unfertilized-- seed production) Protoplast fusion p.742 What is monoculture?
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CHAPTER 39 Control Systems in Plants
Plant Responses to Internal and External Signals
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What is a hormone anyway?
Hormone:
Greek for “to excite
- produced in a specific area
- travel to another specific area (target organ)
- used in minute concentrations
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The Main Players
5 PLANT HORMONES to know …and their functions, target sites, plant conditions, examples
auxincytokinin gibberellin ethyleneabscisic acid
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Auxin
IAA (indoleacetic acid) Location: seed embryo; meristems of apical buds and
young leaves Function: stem elongation; root growth, differentiation,
branching; fruit development; apical dominance; tropisms
Auxin over time
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Cytokinins
Modified forms of adenine Location: roots (and actively growing tissues) Function: root growth and differentiation; cell division
and growth; germination; delay senescence (aging); apical dominance (w/ auxin)
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Gibberellins
GA3
Location: meristems of apical buds and roots, young leaves, embryo
Function: germination of seed and bud; stem elongation; leaf growth; flowering (bolting); fruit
development; root growth and differentiation
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Abscisic acid
ABA Location: leaves, stems, roots, green fruit Function:
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Ethylene
Gaseous hormone Location: ripening fruit tissue; stem nodes; aging
leaves and flowers Function: fruit ripening; oppositional to auxin (leaf
abscission); promotes/inhibits: growth/development of roots, leaves, and flowers; senescence
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Chapter 39.2
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Daily and Seasonal Responses Circadian rhythm (24 hour periodicity) Photoperiodism (phytochromes – red light sensitive)
Short-day plant: light period shorter than a critical length to flower (flower in late summer, fall, or winter; poinsettias, chrysanthemums)
Long-day plant: light period longer than a critical length to flower (flower in late spring or early summer; spinach, radish, lettuce, iris)
Day-neutral plant: unaffected by photoperiod (tomatoes, rice, dandelions) Critical night length controls flowering
Let's see this
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Phototropisms
Cryptochromes (blue light sensitive) Positive is growth toward light Negative growth away from
Sunflower phototropisms Sunflower photomorphogenesis
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Thigmotropisms
Morning Glory response
Mimosa plant response– Example of turgor pressure change as well
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Gravitropisms
Depends on starch filled vessels (amyloplasts) Orientation changes result in differential growth causing curvature.
Roots display positive Stems display negative
Let’s see it
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Lab 5 – Cellular Respiration in Germinating Peas
C6H12O6 + O2 - - - > CO2 + H2O
Issue of O2 & CO2 Solution: KOH + CO2 K2CO3
Also PV = nRTso, if water temp and volume is constant then water will move toward lower pressure area. As oxygen is consumed during respiration, its volume is reduced. Net result is a decrease in volume within in the tube and thus a decrease in pressure in the tube (so water will continue to move in as respiration occurs)
Purpose of only rock tube?Allow detection of any changes in volume due to atmospheric pressure changes or temperature changes.