Plants making food Flashcards
What is the word and balanced symbol equation for photosynthesis?
Carbon dioxide + water –> glucose + oxygen
6CO2 + 6H2O –> C6H12O6 + 6O2
What are the stages of photosynthesis?
Light energy absorbed by the green chemical chlorophyll.
Reaction between CO2 and H2O produces glucose.
Oxygen produced as waste product.
How can glucose be used?
Converted to chemical needed for growth (cellulose, protein and chlorophyll).
Converted into starch for storage.
In respiration to release energy.
What structures will a typical plant cell have?
Chloroplasts, cell membrane, nucleus, cytoplasm, mitochondria, vacuole and cell wall
What are the functions of the structures of a plant cell?
Chloroplast contains chlorophyll and the enzymes for photosynthesis.
Cell membrane allows gases and water to pass in and out of the cell freely while blocking others.
Nucleus contains DNA which carries the genetic code for enzymes and proteins.
Cytoplasm where the enzymes and proteins are made.
How do plants obtain minerals for chemicals needed by cells?
They take in minerals via their roots, like nitrogen from nitrates for proteins
How can minerals and other elements enter plants through roots etc. passively?
Oxygen and carbon dioxide can move in and out of leaves by diffusion.
Osmosis is a type of diffusion for water to move from a dilute solution to a concentrated one through a partially permeable membrane.
How can minerals and other elements enter plants using energy?
If a mineral is in higher concentration inside a plant but still needs to enter it requires energy to move. This is active transport, it is used in the absorption of nitrates by plant roots.
What factors can affect photosynthesis?
The rate of photosynthesis is limited and controlled by temperature, carbon dioxide levels and light intensity. As CO2 and light intensity increases so does the rate of P. However temperature affects it the same way until a certain point, eventually the rate will level off and then decrease due to denaturing.
What techniques are used in fieldwork to investigate lights effect on plants?
A identification key to easily focus onto what you are looking for.
A light meter to measure light intensity.
A quadrat that splits up an area to calculate the average presence of a plant.
A quadrat can be placed along a transect, a line measuring distances between measurements.
