Nucleus

Cells are the smallest unit of any organism that is microscopic, meaning it is too small to be seen.

Cells can be seen with our eyes on both animals and plants, and have different organelles with different functions.

Cells are too small to be seen with our eyes and are only found on animals.

Cells are the smallest unit of any organism, but have no purpose and can sometimes be seen with our eyes.

Plant and animal cells both have cell walls so the cell can maintain its shape.

Animal cells do not have chloroplasts because animals do not require the use of photosynthesis to produce their food.

Plant cells do not have a nucleus because plants are not living organisms like animals are.

Animal cells do not have cytoplasm because an animal cell's organelles are free to move around as they please.

the presence of chloroplasts

the size of the vacuole

the presence of a cell wall

all of these could be used