To make sure they are effective and safe to use in the general population.
illega exposure
Scientific law
That is false
I know any gradual change over a long period of time is evolution
This is a false statement.
Chronic means continuing over a long time.Chronic means present over a long period.
Such is known as its climate.
No, climate is the average weather of a region over a long period of time.
Long period is climate.
?
The process of a species changing over a long period of time is known as a metamorphosis.
climate
Long period comets originate in the Oort Cloud.
Each woman has her own unique ovulation period. They can be tested through over the counter ovulation kits or by tracking a woman's cycle during a calendar month, starting the week after her period ends.
Over a long period of time
because...
climate