Acommon theory about influenza is that it is a disease occurring primarily in cold weather. doctors report incidences of
illness such as influenza to the centers for disease control (cdc). the graph below shows data for three years. note that
this graph shows from october of one year to october of the following year. the leftmost data on the graph begins with
week 40 (october) and shows data through the end of the year. the check mark for week 1 (beginning of january) is
roughly in the middle of the x-axis.
percentage of visits for influenza-like illness from 2006 to 2009
percentage of visits for ili
key:
. - 2006 - 2007
= 2007 - 2008
= 2008 - 2009
national average
"there was no week 53 during
the 2006-2007 and 2007-2008
seasons, therefore the week 53
data point for those

answer: carbon 14 can only be used to determine the age of the organisms that were once living, and igneous rocks are non living.

explanation:

carbon 14 dating is used to determine the age of the sample by estimating the amount of carbon 14 present in the sample and then comparing it with a reference standard.carbon 14 is a isotope of carbon which is radioactive and unstable. carbon 14 is assimilated by all plants and animals throughout their life from carbon dioxide. however, one the organisms die they stop this assimilation and the carbon 14 content starts to decrease.by knowing how much of carbon 14 is left in an organism after his death, one can estimate the age of the organism. the materials whose age can be estimated by carbon 14 method are the organic compounds. however, some inorganic compounds such as aragonite   shell can also be dated.however, if we consider the igneous rocks it is a non living component which never accumulated carbon 14 in it and thus, we cannot use carbon 14 dating method to estimate its age.

Both of them have a nucleus, golgi apparatus, cell membrane, smooth and rough endoplasmic reticulum, lysosome, and ribosomes.