Level Airforce

If 30% of soldiers recruited in airforce in the year 2010 was female, what is the number of males recruited in airforce in that year?

What was the respective ratio between the number of soldiers recruited for airforce in the year 2005 and the number of soldiers recruited in army in the year 2009?

Can we say that there is progressive increase in energy level in successive trophic levels ?

Levels Of Organisation

Levelling Effect

Levels Of Biodiversity