why could cells not be observed and studied for thousand of years ?

We Were Suppressed For Thousands Of Year

Which one of the following has not changed for the last several thousand years

Why cannot the living cells be observed nder electron microscopy?

The population of a town increases at a rate proportional to the population at that time . If the population increases from 40 thousands to 60 thousands in 40 years, What will be the population in another 20 years ? = [ Given: sqrt(3/2) = 1.2247 ]

The following graph below shows the number of students (in thousands) who were admitted to three different courses in 5 years in a university. Study the graph and answer the question. What is the ratio of the number of students who were admitted to course A in the year 2007 to that of students who were admitted to course C in the year 2009?