Answer:
Closed Systems. The earth system as a whole is a closed system. ... Virtually no mass is exchanged between the Earth system and the rest of the universe (except for an occasional meteorite). However, energy in the form of solar radiation passes from the Sun, through the atmosphere to the surface.
Explanation:
Energy. A solute can only move against concentration gradients using active transport which requires energy
D) A & B
it protects the seed against any damage or harmful weather conditions and also helps in dispersal of the seed through different means.
What holds the two strands of DNA molecules to each other. Hydrogen Bonds
