In general, micropipettes are designed to function with accuracies less than 3% of the i tended value. Determine the % error for each of your aliquots with the P200 and the P1000. Percent error is calculated as follow:
Measured value-Accepted value
Percent error =
x 100
Accepted value

volcanoes (an event in the geosphere) release a large amount of particulate matter into the atmosphere. these particles serve as nuclei for the formation of water droplets (hydrosphere). rainfall (hydrosphere) often increases following an eruption, stimulating plant growth (biosphere).

the menstrual cycle – higher tier. negative feedback mechanisms affect the production of hormones in the menstrual cycle. oestrogen also stimulates the release of lh (luteinising hormone) from the pituitary gland, which in turn controls the production of progesterone.