SB6 Plant Structures And Their Functions Flashcards
What is photosynthesis
The process in which plants and algae trap energy transferred by light from the sun and then transfer this energy to glucose molecules
What is biomass
The materials in an organism
What are plants and algae in the food chain
They are producers
Equation of photosynthesis
Carbon dioxide + water makes glucose + oxygen
Where does photosynthesis occur
Photosynthesis occurs in chloroplasts
What type of reaction is photosynthesis and why
Endothermic reaction as the products of photosynthesis have more energy then the reactants
What does chlorophyll do in photosynthesis
Traps energy transferred by light
How is starch made in a plant
As glucose molecules are made they are linked together to form the polymer starch
What happens to starch after photosynthesis
The starch is broken down into simpler substances and used to make sucrose
What is sucrose used to make within a plant
- glucose for respiration
- other molecules for the plant eg cellulose lipids or protein
What are palisade cells
Cells near the top of a leaf that are packed with chloroplasts and allow a leaf to absorb a great deal of light
What are stomata
Microscopic pores on leaves that allow carbon dioxide to diffuse into the leaf.
What are guard cells and how do they work
Water flows into pairs of guard cells making them rigid and therefore Opening and closing the stomata.
What is gas exchange
The flow of different gases into and out of a leaf
What is gas exchange
The flow of different gases into and out of a leaf
