Identify the most common graph types,

circle graphs—illustrate how a part relates to a whole

bar graphs—compare quantities among groups and show large changes over time

histograms—show the distribution and frequency for a set of data values

line graphs—display small changes and patterns in data as well as compare two sets of data

scatter plots—help identify a possible relationship between two groups of numerical data

Explanation:

organisms that are both used in toothpaste as well as cause malaria are protista and monera.

your answer is "the 1950's"