Euglena contain chloroplasts. when light is limited, they can eat particles to obtain energy, are these organisms classified as heterotrophs or autotrophs? how do you know

Mixotrophes! because they are autotrophes and heterotrophes in one :)

The answer is atmosphere. there are four spheres of the earth: 1. geosphere (from greek word 'geo' = ground), 2. hydrosphere (from greek word 'hydro' = water), 3. biosphere (from greek word 'bio' = life), and 4. atmosphere (from greek word 'atmo' = air). a magnetosphere is a region of space around astronomical objects controlled by the magnetic field of that object. through the process of elimination, since lightning is present in the air, it can be found in the atmosphere.