A bird's ability to fly south then winder weather approaches is an example what

adaptation?

If a keystone species is removed from an ecosystem

On a spring day, a middle-latitude city (about 40? north latitude) has a surface (sea-level) temperature of 10 ? c. if vertical soundings reveal a nearly constant environmental lapse rate of 6.5 ? c per kilometer and a temperature at the tropopause of –55 ? c, what is the height of the tropopause?

What nerve is affected in bell palsy