The correct answer is letter A
Commensalism is when one organism benefits off the other one without harming it. Examples are tree frogs that use plants for protection or jackals that have been expelled from packs trailing tigers and feeding on the remains of its kill. Barnacles on whales get shelter by attaching to a whales body
D. Number of protons in an atom's nucleus
Answer:
Plant cells have a large central vacuole, a cell wall, and chloroplasts while animal cells do not.
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Xylem transports and stores water and water-soluble nutrients.
Phloem transports sugars, proteins, and other organic molecules.
