Which structure is the arrow pointing to? what is the function of this organell

What does the structure do that the arrow is pointing to? The nucleus stores water, waste, food and other cellular materials until the cell needs it. This organelle is found only in plant cells.

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QuezoMartiinez <3

the role of the microscope world in creating new materials .

the number of protons in the nucleus of a given element. has slight luster and conducts electricity at high temperatures like metal.but like a nonmetal,boron is brittle and does not conduct electricity well at low temperatures. in graphite, carbon is a soft,brittle solid.it is reflective,ductile,or malleable.