A student carried out an investigation using amylase from a saprophytic fungus. Six wells (holes) of the same size were cut in a starch agar plate. Each well was filled with the same
concentration and volume of amylase solution. An equal volume of buffer solution was added to
produce a different pH in each well. The plates were incubated at 25°C for 4 hours and then
covered with iodine solution. It was observed that there were clear rings around each well. The
width of these clear rings is shown in the table.
pH
Width of clear ring
/ mm
4
1
5
2
6
6
7
11
8
9
9
3
i)
What conclusion can be drawn from the results?
1) Use an appropriate method to estimate the maximum rate of reaction that was observed in
this investigation. Show your working
Maximum rate of reaction

answer:

the water molecules are transferred from the roots to the stem or top parts of the tall tree because of important properties of water which are adhesion, cohesion and capillary action. cohesion is the property of water molecules keeps water molecules in a combined state by sharing of bonds between them at the atomic level. adhesion allows the interaction of water molecules with other substances or substrate. adhesion will cause the attachment of water molecules to the wall of the vessel (xylem) of the plant. capillary action occurs when the adhesive force to the vessel wall is stronger than the cohesive force between water molecules. capillary action mimics the transfer of water from a tube or pipe. in this way water utilizes its property to transfer water from down to top level of the plant.  

multiplying and dividing the two decimals and the eqations by the same number of the overalls

make   gliitsh plesea   !

the water is warmed up by the sun and then it evaporates into the atmosphere. the sunlight warms the water by its heat. water is then cooled down and condensation takes place. the water then finally returns back to the earth by the process of precipitation in the form of rain or ice.

explanation: