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Plant Physiology Mid

QuestionAnswer
converts light energy to the chemical energy of food. Photosynthesis
convert solar energy to the chemical energy of ATP and NADPH. The light reactions
uses the chemical energy of ATP and NADPH to reduce CO2 to sugar. The Calvin cycle
Alternative mechanisms of carbon fixation have evolved in hot, arid climates.
Life on earth is solar powered
capture light energy that has traveled 150 million kilometers from the sun and convert it to chemical energy that is stored in sugar and other organic molecules. The chloroplasts of plants
convert it to chemical energy that is stored in sugar and other organic molecules. Photosynthesis
self feeders autotrophs
they sustain themselves without eating anything derived from other living beings. autotrophs
produce their organic molecules from CO2 and other inorganic raw materials obtained from the environment. autotrophs
producers of the biosphere. autotrophs
These organisms use light energy to drive the synthesis of organic molecules from carbon dioxide and (in most cases) water. photoautotrophs
are the predominant producers of food. In aquatic environments, plants
Types of photoautorophs 1. plants 2. multicellular algae 3. unicellular protists 4. prokaryotes
major sites of photosynthesis leaves
Chloroplasts are found mainly in the cells of the mesophyll
Carbon dioxide enters the leaf, and oxygen exits, by way of microscopic pores called stomata
Water absorbed by the roots is delivered to the leaves in veins
A typical mesophyll cell has about 30–40 chloroplasts
each chloroplast is measure to be 2–4 μm by 4–7 μm.
A chloroplast has an envelope of two membranes surrounding a dense fluid called stroma
Suspended within the stroma is a third membrane system, made up of sacs called thylakoids
segregates the stroma from the thylakoid space inside these sacs thylakoids
In some places, thylakoid sacs are stacked in columns called grana
the green pigment that gives leaves their color, resides in the thylakoid membranes of the chloroplast. Chlorophyll
Created by: nerdynick_21
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