A substance that tends to reduce the surface tension of a liquid in which it is dissolved (took that right from dictionary.com)
Answer:
B. the hormone must enter the cell
Wave–particle duality<span> is the </span>concept<span> that every elementary </span>particle<span> or quantic entity may be partly described in terms not only of </span>particles, but also ofwaves. It expresses the inability of the classical concepts<span> "</span>particle" or "wave<span>" to fully </span>describe<span> the behavior of quantum-scale objects.</span>
Answer:
grass
Explanation:
grass produces the main source of energy for the food chain
No Spanish sorry about that