When do both hemispheres receive the same amount of the sun’s energy?

both September and March equinox

only winter solstice

only September equinox

only March equinox

this protocol describes a detailed procedure for intracellular flow cytometry staining.

you must remain stopped until the stop signal is retracted and the red lights are turned off. approaching traffic in the opposite roadway of a divided highway shall not be required to stop, even if the school bus has the stop-arm extended and the alternately flashing warning signal lamps on.