The general answer would be evolution. You could also say adaptation, (which is a part of evolution), meaning over a very long period of time tiny variations can creep into a species and if that variation works to help that species survive better in their environment, those particular ones will pass on their genes and that variation becomes permanent and the ones of the same species die out (who don't have that variation).
For example if a bird gets a tiny curve in their beak due to a genetic "defect", and it ends up that the defect actually helps them break the shell of a nut they feed on then the babies of that bird will pass on the curve which would now not be considered a defect any more.
evolution
The process of a species changing over a long period of time is known as a metamorphosis.
Reproduction - production of similar speciesAdaption - ability of/to adjustMetabolism - chemical processes that occur in living cellsMovement - physical locomotionIrritability - response to stimuliUnique Chemical Composition (UCC) -all living things are made of waterComplex Organizations - all living things are made out of cellLife span - definite period of existenceGrowth - growth of cellDefinite form and size - every living things have different form and size
stroage
That's the process of menstruation - or a 'period'.
This Process called the Environment
dick
She grew more mature. She couldn't wait for her period, and for her body to change.
If the fossil of some animal was different from animals now, that shows that the animal species has changed over that period of time.
evolution
we need more detail
During the medieval period, middle English changed to modern English.
Everybodys period is different and changed regulary. There is no need to worry if ur period is light or if you even miss one (unless youve had sex) our body doesnt NEED to have a period every month. Its normal for it to change
Movement: an act of changing physical location or position or of having this changed. Moment: a very brief period of time.
Conduction and respiration process.
The Elizabethan Period
Humans are currently living in the Quatentary Period and in the Holocene Epoch.