Live vs Recorded

Assertion. Cycas is called a living fossil. Reason. Cycas has a long geographical record evidenced by its fossils and still occurs in living condition, in a limited area.

Primary vs Secondary Pollutant

Primary vs Secondary Meristems

Acquired vs Inherited Traits

Public Vs Private Sector

Linkage vs Crossing Over

Leydig vs Sertoli Cells

Afferent vs Efferent Arteriole

Microsporogenesis vs Megasporogenesis