what does negative data mean what is positive data what is negative data why do scientists collect negative evidence when the organism is present what is positive data on moths which of the following types of data should be used to determine the presence of a moth why are negative moth data important when do moths exist? when did moths first appear how can data from a photo be used in an estimate of a moths abundance? what is the difference between a positive and negative photo for a moth fossil how can you use a data set to estimate the location of a moth? why use a negative data why is it important to find out where a moth is in the world what's the difference between a positive and negative data file is there a way to collect data on moths where are moths found which data sets are used to predict species distribution and expansion? what's the difference between a positive and negative data when was the moth first photographed