<span>The process of splitting and Atom into two lighters atoms is called </span>
12: B, since it said the temperature is below 3,500
Answer:materials that impede the free flow of electrons from atom to atom and molecule to molecule.
Answer:
Option B, When the cell needs to move a compound against its concentration gradient.
Explanation:
A cell uses active transport when it has to transport substances against the concentration gradient across its membrane.
In active transport additional energy is used (generally provided by energy molecules like ATP) to push the substance across any membrane from low concentration side to high concentration side.
Option B is correct
3 weathering brainliest me pls:)
