Untitled Deck Flashcards
Name the four parts of a plant
Roots, stem, leaves, flower
State the function of the roots
Absorb water and minerals from the soil, anchorage
State the function of the stem
Transport of water, minerals, sugars and amino acids, support
State the function of the leaves
Photosynthesis to produce food for the plant
State the function of the flower
Reproduction
What is meristem tissue?
Area of the plant where cells are dividing by mitosis
Where is meristem tissue found?
Tips of roots and shoots
Define transpiration
Loss of water from the leaves
How does water vapour exit the leaves?
Through stomata by diffusion
State the four factors which affect transpiration
Light intensity, temperature, humidity, air movement
Which vessel is responsible for carrying water and minerals around the plant?
Xylem
What piece of equipment can be used to measure the rate of transpiration?
Potometer
Define translocation
The movement of dissolved sugars and amino acids around the plant
What form of sugar is transported around the plant?
Sucrose
Which vessel is responsible for carrying sucrose and amino acids around the plant?
Phloem
What separating technique can be used to separate different pigments within a mixture?
Chromatography
Why must the origin line be drawn in pencil?
To prevent it being carried up the paper
What is the mobile phase?
The phase which moves - the solvent
Name two examples of solvents
Water and an alcohol, e.g. ethanol
What is the stationary phase?
The phase which does not move - the paper
How do you calculate the Rf value of a pigment?
Distance moved by compound ÷ Distance moved by the solvent
Where should the distance moved by the compound and solvent be measured from?
From the origin line
What does it mean if a spot is left on the origin left after chromatogarphy is carried out?
The pigment is insoluble in the solvent
State the reactants for photosynthesis
Carbon dioxide and water
