Alllivingorganisms,regardlessoftheiruniqueidentity,havecertainbiological,chemical,andphysicalcharacteristicsincommon.

When carbon is added to iron in the proper proportions , the result is steel.

In calculating the daily calorie requirements for an individual, variations in body size, physical activity, and age should be taken into account.

Incalculatingthedailycalorierequirementsforanindividual,variationsinbodysize,physicalactivity,andageshouldbetakenintoaccount.

The wheels of the first road vehicles were fashioned from crude stone disks.