Answer:
A. movement of molecules across a semipermeable membrane against a concentration gradient with a protein
Answer:
Explanation:
During a physical change, the arrangement of particles may change but the mass, number of atoms and number of molecules will stay the same. ... During a chemical change, the mass and number of atoms is conserved, but the number of molecules is not always the same. Chemical reactions involve large changes in energy.
Conversion of cellulose into glucose units.
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Answer:
C. Both of the above.........
