Which of the following is the shortest interval of geologic time?

an eon
a period
an era

How will technology impact medicine in the future?

Which of the following would be a body response when stepping outside without a coat on a snowy day? a. senaceous glands. secrete more senum b. more liquid is transported by the body to the skin fir insulation c. blood vessels in the skin narrow and contract d. blood vessels in the skin expand

In general, characteristics that an organism survive and reproduce become more common over time. what mechanism of evolution causes this?