photosynthesis process in which light energy converts inorganic compounds into chemical energy of...
TRANSCRIPT
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Photosynthesis Process in which light
energy converts inorganic compounds into chemical energy of organic compounds (food)
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Form of autotrophic nutrition
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EquationCarbon + dioxide
water
oxygenglucose +water +light
Chlorophyll
light6CO2 +12H2O C6H12O6 + 6H2O + 6O2Chlorophyll
http://www.kscience.co.uk/animations/photosynthesis.swf
(wastes)
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Where does Photosynthesis occur?
Cells of leaves
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Cells that contain chloroplast which contains chlorophyll
a green pigment that absorbs light
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AutotrophsAutotrophs perform photosynthesis. perform photosynthesis.
Include most plants, some bacteria & Include most plants, some bacteria & protists protists
(algae)(algae) Capable of synthesizing Capable of synthesizing organicorganic materials from materials from
inorganicinorganic raw materials raw materials Ultimate source of energy = SunUltimate source of energy = Sun
(a) Mosses, ferns, andflowering plants
(b) Kelp
(c) Euglena(d) Cyanobacteria
THE BASICS:THE BASICS:
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Organelle: Occurs in the CHLOROPLASTRaw materials: Carbon dioxide & WaterProducts: Glucose & Oxygen gasPlants use some Glucose for their own energy– and
store excess as STARCH
THE BASICS:THE BASICS:
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Review
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video
Raw materials/ reactants Products
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Leaf is the photosynthetic organ of the plant
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What happensduring photosynthesis?
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2 PARTS1. Light dependent reactions
Photochemical reactions
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Chlorophyll traps light causing
Water to split into H and O
H2O H2 + O
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Oxygen (waste) exits through stomata
Hydrogen = used for next part
H2O H2 + O
Oxygen (air)
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2. Light – Independent reactions
Dark reactions Carbon fixationNo light needed
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CO2 and H combine to form glucose
CO2+ H
Glucose (C6H12O6
)
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What are the gas bubbles produced by the plant?Which of the 2 reactions produced these
bubbles, the light or the dark?
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Best color light for photosynthesisBlue & red
Easily absorbed
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Least effective = green (reflected)
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What is the glucose used for?Respiration (making energy)
Glucose
ATP
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Stored as starch
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Do plantscarry outrespiration?
Yes in order to produce energy
Aerobic Respiration
Occurs in mitochondria
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Do you recall?Which organelle is the site of autotrophic nutrition?
What are the two raw materials necessary for a plant to perform photosynthesis?
Analyze this reaction isit dehydration synthesis or hydrolysis?
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A
CB
DO NOW: Copy and complete the chart
below and answer the question below.
Why is photosynthesis an important process to all living things?
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Reverse of photosynthesis
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Produces food (source of energy) for itself & all
other organisms
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ROOTS STOMATA
LEAVES
VASCULAR TISSUE/BUNDLE
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the root is the organ of a plant body that typically lies below the surface of the soilThe two major functions of roots
are
ROOTS
1.) absorption of water and inorganic nutrients 2.) anchoring the plant body to the ground
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ROOT HAIRSIncrease surface
area for absorption of
water and nutrients
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STOMATA (stomate; singular) is a pore found in the leaf and stem epidermis that is used for gas exchange Guard cells which
are responsible for regulating the size of the opening
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LEAVES
A leaf is an above-ground plant organ specialized for photosynthesis
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Adaptive Features of Leaves
Flat and thin to increase surface area for light exposure
Stomata on the lower surface
Cuticle for protection
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ChloroplastsPalisade Layer
Spongy Layer
Epidermis
Stomate and guard cells
Cuticle
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CUTLICLE
Prevents contamination of plant tissues with external water, dirt and microorganisms
Creates a waterproof membrane
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VASCULAR TISSUE
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VASCULAR TISSUE/BUNDLE
Contains Xylem and Phloem tubes
Tubes that are used to transport materials
around plant
Xylem transports water from the roots
Phloem transports food (glucose)
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Review:
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Abiotic = nonliving part of ecosystem (ex. minerals, water,
temperature)
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Photosynthesis Song http://www.youtube.com/watch?v=C1_u
ez5WX1o
The World of Plants: Photosynthesis – unitedstreaming.com
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CHROMATOGRAPHY
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The water is above the pigment mixture spot
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Different Pigments Absorb Different Pigments Absorb Light DifferentlyLight Differently
Best Overall Colors: _____________ and ____________
Worst Overall Color: _______________
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Within which Within which organelleorganelle does photosynthesis occur? does photosynthesis occur? What are the two What are the two raw materialsraw materials of photosynthesis? of photosynthesis? What are the What are the productsproducts of the photosynthesis reaction? of the photosynthesis reaction? What What types of organismstypes of organisms perform photosynthesis?perform photosynthesis? What is the major product of the What is the major product of the light reactionlight reaction?? What is the major product of the What is the major product of the dark reactiondark reaction?? WhereWhere does the light reaction occur? does the light reaction occur? WhereWhere does the dark reaction occur? does the dark reaction occur? What molecule is What molecule is splitsplit in order to release oxygen gas? in order to release oxygen gas? What is the ultimate source of energy for life on earth?What is the ultimate source of energy for life on earth? What are the two most effective colors of light for What are the two most effective colors of light for
photosynthesis?photosynthesis? What is the worst color of light for photosynthesis?What is the worst color of light for photosynthesis? Provide an example of 3 organisms that are capable of Provide an example of 3 organisms that are capable of
photosynthesizing. photosynthesizing.
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plateau
At low CO2 concentration, rate is positively correlated with concentration
As amount of available CO2 increases, photosynthesis increases
until a point, then it levels off.
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plateau
As the amount of available light
increases, the rate of photosynthesis
increases - then it levels off.
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Increased temp. gives increased energy and increased rate of photosynthesis
Optimum temperature
Above the optimum temp., enzymes are denatured and rate drops steeply.
Which enzymes are used in respiration?
As temperature increases, rate of photosynthesis increases to a point…
Above 35 C the rate rapidly decreases…
WHY???
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Photosynthesis is the process by which light energy is converted
into chemical energy.
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True or False: Photosynthesis
occurs during the day-time ONLY!
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True or False:As the temperature increases, the rate of photosynthesis will
decrease.
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True or False:Oxygen and water are the raw materials for
the process of photosynthesis.
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True of False:Photosynthesis is a
process performed by autotrophs in which light energy is converted into
chemical energy.
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This term refers to the complex
carbohydrate that plants store their excess sugar as?
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What is the least effective color of
light for plants to do photosynthesis in?
Why?
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True or False:Guard Cells are holes in
the surface of a leaf which allow the
passage of oxygen gas.
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What life process studied earlier this year includes the
process of photosynthesis?
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Explain the Process of Photosynthesis with regard to the following:
List the raw materials needed for this process List the products made from this process State the types of organisms that do this process State the time of day that this process takes place State the type of cells (plant or animal) that are capable
of this process State the importance of this process Explain how the glucose created in this process enters
the cells of animals and is put to use.
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1. What is this picture a cross section of?
2. What are tiny openings found in the lower epidermis called?
3. What structures are present to control the opening and closing of these “holes”?
4. What substances are exchanged through these openings?
5. How is the closing of these tiny openings during a drought an exmape of the plant maintaining homeostasis?
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1. Identify one substance that could be found at letter “A”.
2. Identify the source of energy necessary to allow the chloroplast to perform photosynthesis.
3. What types of cells, plant or animal, contain mitochondria?
4. What are the two substances released by the chloroplast at letter “B”?
5. What important cell process can the mitochondria perform?
6. What is the ATP released by the mitochondria used for?
7. What might a plant do with excess glucose produced by photosynthesis?
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How does the structure of a leaf assist in the maintenance of homeostasis for the plant?