We concluded that the radiation from the microwave would not affect the plants very drastically with such small amounts, but giving it too much would still have an effect. We can see this from the seed coat. The radiation was in such small amount but so bad that even mould couldn't grow on it.
Radiation affects rates of cell division. Hastening and slowing down affect embryonic tissues. Damages to cell membrane, mitochondria and cell nuclei result in abnormal cell functions, affecting their growth, division and death. - (cchieh)
Collectively we can refer to these kind of radiation as ionising radiation. It can causes damage to matter, particularly living tissue. - (World Nuclear Association, 2012)
Unfortunately, radiation also has a negative effect on healthy cells. By mutating genes into the nucleus of healthy cells, these normal cells are more likely to later develop into cancer - (LifeExtension, 2011)
We know that if the radiation dose is quite large and given in a short period of time, like the 1,000 rem in the chart above, it will cause an individual to be very sick and die. - (RadiationAnswers, 2007)
From the consistency of results from others saying that radiation has bad effects which can cause sickness and even death, it is confirmed that our results are correct and match it.
We also concluded that the plants did not receive enough radiation for us to see the effects. The plants might need a larger amount of radiation, perhaps an experiment over a month or two, like how humans eat a lots of microwaved food a day.
So, radiation will not kill us, but we need to watch out, not to eat too much microwaved food, so that our body will be kept healthy.
We could further study the aspect on whether small amounts of radiation might help as one of the setups had a very huge increase in growth rate for a certain period.