Question

A scientist is observing a cell in notices the presence of starch what does this tell her about the cell

Answer 1

There are many differences between a plant cell and animal cell

In animal cell glycogen is the energy storage carbohydrate.

In plant cell starch is the energy storage carbohydrate

so if we notice the presence of starch in a cell it tells that it must be a plant cell.

Answer 2

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Below are the choices the answer is E 

A. It is an animal cell because starch is the energy storing molecule in animal cells. 
B. It is an animal cell because starch is responsible for protein synthesizing in animal cells. 
C. It is a plant cell because starch is responsible for protein synthesizing in plant cells. 
D. It is a plant cell because starch is responsible for cell building in plant cells. 
E. It is a plant cell because starch is the energy storing molecule in plant cells.