Which of the following correctly describes the stem?
a) the stem contains tubes, which transport sugars and water around the plant.
b) the stem is the site of the most photosynthesis in the plant.
c) the stem is where stomata are located, which regulate the amount of carbon dioxide that can enter and water that exits
d) the stem obtain water from the surrounding

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.

He used pea plants to study the patterns of heredity.

Ais the