Photosynthesis

anniemarsh11
Flashcards by anniemarsh11, updated more than 1 year ago
anniemarsh11
Created by anniemarsh11 over 5 years ago
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*difference between autotrophic, heterotrophic and saprophytic nutrition *photosynthesis in green plants *relating the structure of the leaf of a flowering plant to its function in photosynthesis *environmental factors affecting rate of photosynthesis

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Question Answer
Heterotrophic Nutrition Eats organic materials (glucose, H6H12O6) *animalia *protoctists
Autotrophic Nutrition Converting inorganic material (CO2,H2O) into organic material (glucose) *Plants
Saprophytic Nutrition Breaks organic material down and converts it back to inorganic material by decomposing dead organisms *bacteria *fungi
Photosynthesis equation 6CD2 + 6H2O ---------> (light/chlorophyll) C6H12O6 + 6O2
Photosynthesis: *makes organic material from inorganic material *Begins all food chains and makes oxygen
Photosynthesis means: putting together with light
Why are stomata on the underside of the leaf? The leaf would become flaccid without stomata due to water loss and neither photosynthesis nor gas exchange would occur. The leaf would always be closed and the plant would eventually die.
CHLOROPLASTS: organelle within the leaf that contains chlorophylla
A THANA consists of thylakoids and is found inside a chloroplast
Photosynthesis formula carbon dioxide + water --------> (light/chlorophyll) glucose + oxygen
What is at the centre of a chlorophyll molecule? a single magnesium atom chemically bonded to four atoms of nitrogen
what are the two main stages in photosynthesis? Light dependent stage and light independent stage
Light independent stage chlorophyll traps light energy from the sun and the energy is used to split H2O into hydrogen and oxygen. the oxygen diffuses out of the leaf as a waste product
Light independent stage hydrogen then combines with carbon dioxide to make glucose ( C6 H12 O6). This stage does not need light.
LEAF ADAPTATIONS *large surface area to absorb light and carbon d. *they lie 90 degrees toward sunlight and spaced around the stem to catch light *Leaves are thin to allow carbon d and light to reach all cells quickly
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