TEST IS TIMED. Anaerobic exersize means... 1. Use of the oxygen transport system to provide energy for long periods of time
2. Use of the oxygen transport system to provide energy for short bursts
3. Use of the glycogen transport system to provide energy for long periods of time
4. Use of the glycogen transport system to provide energy for short bursts

Me with this i need to get the answer quickly.

How could natural selection best be used to explain the evolution of the white fur of arctic fox

Which of the following accounts for someone who has had regular herpesvirus-mediated cold sore or genital sore flare-ups? a) re-infection by a closely related herpesvirus of a different strainb) re-infection by the same herpesvirus strainc) copies of the herpesvirus genome permanently maintained in host nucleid) copies of the herpesvirus genome permanently maintained in host cell cytoplasm