As humans we have a hard time telling penguins apart. However, They can tell each other apart by distinct vocalizations.
Apart from that, I couldn't tell you. The tow truck will pull the cars apart from each other.
by their ID cards
Well that's simple! you can tell them apert if you mark them or by their behavior.
yes
Each was given a number. It was tattooed on the inside of the forearm.
Monarks have 1dot on each wing on the male.
unfortunately they could not always tell so friendly fire killed many soldiers
Two lines are parallel when they remain equal distance apart and never intersect each other
They all describe data set or data sets,hey tell you how far apart they are from each other.
to tell them apart from other
Dolphins communicate because it's their way of talking to each other. For example, every dolphin has a signature whistle. They use these whistles when their in danger, calling to someone, or to tell each other apart.