Comparing the skeletons of which of the following fish would best show the evolution of a fish species?
===

a fish that lived recently and a fish that lived a long time ago

A manufacturer wants to produce a container for food storage that does not break easily and is airtight, inexpensive, and microwave-safe. Which of the following is the best material to use to make the container?
===

plastic

Some businesses offer customers the option to pay for merchandise using their fingerprints as identification. Which of the following would most benefit customers that use this new technology?
===
protection of private information