The cross-over point describes the exercise duration when there is a shift from oxidative metabolism supplying the majority of energy to nonoxidative metabolism supplying the majority of energy. true or false?

the main thing i would use is bricks because if there is a hurricane, there is a great possibility for the house to still stand. and i would also use plexiglass windows instead of regular windows because plexiglass isn't prone to breaking.

a bird that nests only in a particular tree species.